The iBLOPPER is very easy to use after it have been build.

1. Attach iBLOPPER till your S-airlock by rubber bands.
2. Enter Brewname, OG, Brewsize at iBLOPPER Access Point.
3. Decide on Start-out polynomial (see below, “Best settings for S-airlock”).
4. Ensure the fermenter and iBLOPPER cables is isolated from vibrations.
5. Use a S-airlock with cap on (evaporation) + a tiny drilled hole at top (pressure equalization). Use 5ml water in it.
6. Follow the Blop pr. min (BPM) in either Brewfather or Ubidots STEM.
7. During 33-66% into fermentation (preferably when high kreuzen has just passed), take one hydrometer reading. Calculate the speed of fermentation (polynomial) for this brew by simple math’s, e.g. “Reduction in gravity”¹ divided by “Sum BPM/L”, and then once update the iBLOPPER with this new polynomial.
8. That its. Hence, this way you can foresee the final SG by an error of mean of 3-5 points.

Hydrometer reading of OG and “one hydrometer reading” must be precise. This give you full insight in the fermentation, by activity, temperature, and how far it have come through indicative SG estimate. All by not adding anything into the wort.

(¹ Reduction in gravity, rG = OG – SG)

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Full Introduction

The iBLOPPER is an Arduino device (ESP8266) and sold accordingly as a Arduino-kit. It monitor your yeast activity by motioning the CO2 blops pr. minute (BPM). Besides BPM, also “Sum BPM/L” and temperature is logged. Based on Sum BPM/L indicative gravity estimate is give by polynomial/modelistic approach.

It works by placing iBLOPPER on the outside of the airlock, and iBLOPPER then detects the tiny movement the airlock makes at the release of a bubble. Hence, it need placed away from vibrations sources (flamingo mat in cooler or similarly).

The software can though the “Sum BPM/L” be used to give an indicative SG/rG (reduction in gravity) by polynomial approach. To ensure a reliable SG estimation and to account for the many factors affecting CO2 release the users needs to conduct “one hydrometer reading” when preferably high kreuzen has just passed and hence re-calculating and updating the polynomial for the current brew by very simple maths (e.g. “reduction in gravity” divided by “Sum BPM/L”, for instance 14/1700 => Y=0.0082x). For more details see below!

This approach allows all fermenters and S-airlocks to be used with iBLOPPER, but the user should strive towards fermenters with high airtightness for best results. This approach should works for other types of airlocks, but currently not tested in full (help appreciated).

Hence, the idea of iBLOPPER is by simply adding one more hydrometer reading on top of the OG, and the 2 FG measurement we all recommend, this 4th sampling at preferably high kreuzen can tell us something about the speed of fermentation, thus, giving us an indicative estimate of the SG.

All data can be send til Ubidots STEM and Brewfather, as below image shows:

Initial setup/operate

The iBLOPPER got a captive portal mode (Wifi Access Point mode) and hence you log on just as it was a Wifi access point. If the login page do not automatically come up, go to: 192.168.4.

It will for 120 seconds go into this “Captive Portal” at power on (or after any failures as lost connection or lost power) where all setting can be done, e.g Brew Name, SSID+Password, Brew Size, Original Gravity, Polynomial, License, Location and setting URL of either Brewfather URL/Ubidots STEM Token. It light Blue for 120 sec when in portal mode/access point mode. Please notice any changes in portal must always be followed by setting SSID and Password, each and every time any changes is done.

Likewise it light blue when sending/treating data for 1-2 seconds. Samwise a short blue blink is seen when it detect a bubble.

Hence,

• Connect till the “iBLOPPER CONNECT” SoftAP though either you mobile phone or laptop by Wifi. After connect till access point the Bubble-logger url for the configuration page is: 192.168.4.1
• Set the various parameters accordingly (Currently, you need to set SSID+Password every time you enter “Captive Portal” mode, so you need to set SSID+password even you just changed one parameter). If you changed polynomial during last brew consider to reset polynomial!
• If you later on wish to change for instance polynominal, pull power for 2 sec, and go into portal mode again and make the change (remember to set SSID+password again too).

Secondly, the iBLOPPER also got a web server you can follow all data on during brewing, to access webserver you need to find the IP and best way currently is to look in the IP routing table or some Network sniffer program as “Advance IP Scanner” (https://www.advanced-ip-scanner.com). The Web server is on: 192.168.1.xxx.

We strongly propose you get a Ubidots STEM account and hence insert the TOKEN, and for Brewfather you need to enable “Custom Stream” and inset this associated URL into Bubble-logger.

Some other considerations:

• The SSID and password always needs to be set even just changing a parameter.
• Sometime after hitting “Save” iBLOPPER need a second re-run of portal (120 sec blue light) to get the internet established.
• Best behaviour for portal mode is seen with iOS browser/phones.

Best settings for S-airlock ( + Airtight fermenters)

The iBLOPPER needs a baseline or “start-out” polynomial for the S-airlock and also a few other setting/considerations need to be done.

• Start-out Polynomial for airtight fermenters (there’s a tendency higher headspace give higher polynomial) :
  • 0.0060*sum if headspace below 0-17% (Not recommend, likely to give blow-out).
  • 0.0075*sum if headspace 18-30% (generally the most suited range).
  • 0.0090*sum if headspace above 30%
  • Or use: headspace% * 0.00027824x (eg. 50 * 0.00027824x = 0.0139x => Polynomial = 0.0139*sum).
• 5 ml water in airlock
• Tiny hole in top of airlock to equalize pressure
• Cap/”hat” on to lower evaporation
• Sensitivity: 4

If using none-airtight fermenters (buckets) the polynomial will be different (way higher as you loose CO2), and as such needs further considerations. The “one hydrometer reading” will tell you the speed of fermentation, but the difference between start-out polynomial and your final polynomial will be more pronounced.

Please also notice, the polynomials above was created by the “tiny” hole and cap on S-airlocks, and even you can use the iBLOPPER without and get good results by the “One hydrometer reading” approach, then above Start-out polynomials will differ then.

Other Airlocks?

I have not in full tested other than S-airlocks. The 3-4 test brew I done with other types of airlocks indicate this works well with other airlocks, but for instance Speidels airlock would need a bit of weight to give a stable bubbling-rate (vibrations). Hence, other airlocks than S-airlocks might need a adventures approach from the user.

What data is send?

The following data is send till Ubidtos STEM and Brewfather:

• “Blop pr. min” is send as: BPM
• “Sum BPM/L” is send till Ubidots (only till Brewfather as a “comment”).
• “Gravity” is send as: Gravity (G)
• “Temperature” is send as: Temperature (C)

(Please notice I do not and do not intend to support other than metric numbers. 3rd worlds countries has to add up and follow the scientific rules.)

Opperation during brewing = getting precise SG

During the brewing you will need to take one hydrometer sampling at preferably 33-66% into the fermentation (high kreuzen) and calculate the 1st degree polynomial or “speed of fermentation” for this brew. We call this “One Hydrometer Reading” approach. As the release of C02 is ensured linear by the iBLOPPER software (see more below under “Deep drive into data”), the math is very simple. Just take the rG (reduction in gravity) and divide by “sum BPM/L”. In the below case we had OG of 1056 and after “1025 Sum BPM/L” the rG was 14 measured by hydrometer, thus, 14/1025 => Polynomial=0.01366*sum.

After you made this simple calculation you might need (but not always if difference is small compared till the existing polynomial) to update iBLOPPER with the new polynomial and hence now the SG prediction follows the current brew (orange line below) and hence include this brew equipment, airtightness, yeast, wort, pressure, temperature and all other factors impacting CO2 release. Therefore, you will see a change based on this “one hydrometer reading” adjustment. It should be noted this approach put much faith into precise hydrometer measurements and hence a keen eye and good technic in the field of hydrometer sampling is needed. An misread off 2-4-6 at “one hydrometer reading” sampling point can fastly be 5-10-15 SG units in the end if a high-voluminous beers is in the making.

Important “take on messages” for estrimating SG

• Sensor should be calibrated till “hear and see” matching count, e.g. adjust sensitivity in portal mode if needed (4 should be fine though). The “one hydrometer reading” approach somehow will solve any calibration errors, but if you wish to have a “true” and quantitative picture of BPM the calibration should be considered.
• 5 ml water in S-Airlock to get best blop/vibration.
• Use a fermenter there is airtight. Be a “Leak Hunter”!
• Take notice of your amounts in Liters and set this in iBLOPPER setup. Same for OG.
• Take “one hydrometer reading” during brewing and recalculate the polynomial for this brew and adjust in portal mode accordingly.
• PLEASE NOTICE, this “one hydrometer reading” need to be precise, hence, double check it and read up onpon how to take hydrometer readings.
• Make use of slow and controlled fermentation and/or good headspace between 15-30%.
• Or, use a closed airtight blow-out system.
• Steady WiFi is needed for the logger to obtain data it needs for calculation (e.g. surrounding pressure).
• LIMITATION: iBLOPPER works by detecting vibration at the release of a bubble, hence, you will need to isolate the fermenter from vibrations and hence best to place fermenters away from washing machine, etc. I use flemingo in my cooler to isolate the vibrations. Also the cord must be isolated from any vibration especially when using a cooler.

How to build

To build an iBLOPPER one need very basical skills in soldering, and even if you have not prior done any soldering we do beleive every one can do this build. Below you find the instructions ande the components needed:

• 1x NodeMCU modded⁽¹⁾
• 1x Box
• 1x DS18b20 probe, 1 meter, + resistor, where resistor needs to go from D4 till VCC. The signal cord (yellow) from temperature probe go also till D4, and power (red) till VCC. GRD (black) goes till GRD
• 1x MPU6050 where VCC till 3V3, GRD till GRD, SCL=D5, SDA=D6 is connected accordingly till NodeMCU
• 1x Ballon (12cm version)

(1) We modd the NodeMCU by removing legs for the MPU6050 placement, and bent the temperature legs, to indicate where to solder the various components.

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Uploading software incase you source components yourself and only buy “license”

If you choose to source components yourself or wish to re-install and hence hence needs to upload the software, please see this page “Installing/Burn/Update iblopper“

Estimate of “reduction in gravity” (rG) or SG prediction

The software can be used to give an indicative rG (reduction in gravity) or SG estimate base on one hydrometer measurement is taken during brewing at preferable when high kreuzen has passed.

What we measure is as said the Blops pr. Min coming when CO2 is released by vibration detection, e.g. BPM, and if we look at the chemistry behind the metabolisms of fermentation of sugar by yeast cells, we see one part Alcohol generate two part CO2. Hence, CO2 is a direct measurement of the alcohol production. This should be a linear function, and the key issue is to measurement this gas accurate and precise. Hence, sealed air tight tanks is a good start.

           C6H12O6    ====>   2(CH3CH2OH) + 2(CO2) (+Energy)

            Sugar     ====>    Alcohol    +   Carbon dioxide gas (+Energy)

Hence, by knowing the BPM and brew size (L) and other involving constants we can plot a curve of Sum BLOPS/L vs. the reduction in Gravity and generate a model and polynomial for the alcohol production based on our initial measurement of Blops pr. Min (BPM), se more below.

Factors impacting on SG estrimation

There is a long list of factors affecting the SG estrimation, as shown by following figure:

The Atmospheric pressure and temperature in particular impacts on the bubbling rate, hence, the iBLOPPER software contains complex build in models to account for change of pressure and temperature and reports the adjusted “Sum BLOPS(pt)/L” ensuring the “Sum BPM/L” becomes a linear function. Besides the climatic factors, then also the headspace and especially the “hat/cap” on/off and tightness/resistance of “hat” do give big variation in bubble-rate. The amount of water in S-airlock alos impact on bubbling rate. More unknown is the various yeasts and wort-possibilites, but these are assumed to be less impacting.

Therefore, to ensure a good user experience, the user needs to make the "one hydrometer reading" during brewing as this more or less balance most of above factors out if this sample/measurement is conducted precise and trustworthy.

Approaches for estimating SG

There is as such 2 ways or approaches for estimating SG from C02:

“Same procedure/Same equipment from brew till brew”, if using same equipment and same procedure from brew till brew only climatic and physical factors is left to impacting, and as such this procedure can be used with the same developed polynomial for brew till brew. But it is a tedious approach, and just a slight error in airtightness, or different airlock, cap resistance (on/off/loose), headspace, water amount, etc. can offset this polynomial for the equipment. But this is still the approach to find the range of a future-wise usable polynomial (baseline) for a given airlock.

“One hydrometer reading”, as said before this is what we propose is best suited to remove a lot of unknowns. simply to take one hydrometer reading during the initial brewing, best at preferably 33-66% (when high kreuzen just passed) into the fermentation and hence update the polynomial for each brew. If using a S-airlock and the earlier stated polynomial you would expect the fololwing sum blop before taking a sample:

• 0-17% headspace (Polynomial of 0.0060X) have at least 2500-3500 “SUM BPM/L”
• 17-30% headpace (Polynomial of 0.0075x) have around 1700-2500 “SUM BPM/L”
• 30% and above headspace (Polynomial of 0.0090x) at least 1000-1700 “SUM BPM/L”

The above can somehow also be extracted from above graph of all the data.

Deep diving into the data

Below you find links till the data behind this project for S-airlock with 4-5ml water and with a tiny equalization hole in S-airlock + the cap on to lower evaporation. It is based on various sensors, e.g. sound, infrared and MPU6050, and various S-airlocks, but the volume in S-airlock have been between 4-5ml.

Deep diving further into the data for S-airlock, you will notice the “One hydrometer reading” approach during the main fermentation at preferably around 33-66% complete, e.g. high kreuzen, we get a error of mean of 3.3 SG units.

All the data for S-airlock

Below you find all the data during the last years. If using the “one hydrometer reading” preferably at 33-66% (e.g. high kreuzen has just passed) into the fermentation an error of mean around 3.3 SG units is justified.

All data is done with S-airlock (assuming 4-5 different types used during the testning, but all mat/soft plastic), 4-5 ml water in airlock, and the data is a mix of sensors, e.g. sound, infrared and MPU6050. For S-airlock a tiny hole in top of airlock have been drilled to equalize pressure, secondly, the “hat” was on to lower evaporation. I do compare the dataset with a Baseline/”Normal Brew” by headspace of around 25%, e.g. function of Y=0.0074*x. This is to show unless one keeps all parameters the same, the use of a single polynomial from brew till brew cannot be used as such.

Brew 33 “DD Citra IPA – check of very high headspace of 52%”

MPU6050 sensor. OG=1058, FG=1014, 16.5L (32L Plastic Barrel).

Link till Brewfather: https://share.brewfather.app/TFc2jJNWAKxzaR

Link till “One Hydrometer Reading” approach picture: DD-Citra-IPA-1.png

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
?	20	0	0	1058	0
?	22	457	6	1052	3
?	24	2015	32	1026	15		y=0.0159x	32
?	20	2742	44	1014	20			44
						24			0

The graph of the data for rG and Sum BPM/L:

Brew 32 “A Citra Wit – check of very high headspace of 55%”

MPU6050 sensor. OG=1053, FG=1016, 14.5L (32L Metal Tank).

Link till Brewfather: https://share.brewfather.app/TFc2jJNWAKxzaR

Link till “One Hydrometer Reading” approach picture: citra_wheat_final_SG.png

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
?	18	0	0	1053	0
?	22	1445	29	1024	15		Y=0.00200x	29
?	20	1885	37	1016	29			38
?	20	1925	37	1016	32			39
						23			2

The graph of the data for rG and Sum BPM/L:

Brew 31 “Sugarwort 4 – check of very high headspace of 50%”

MPU6050 sensor. OG=1054, FG=999, 6.5L (13L Plastic Speidel Tank used).

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
?	19	0	0	1054	0
?	19	2041	27	1027	15		Y=0.01326x	27
?	20	3893	49	1005	29			52
?	21	4336	55	999	32			58
						23			3

The graph of the data for rG and Sum BPM/L:

Brew 30: “Amber Lager”

MPU6050 sensor. OG=1054, FG=1005, 11.8L (13L Plastic Speidel Tank used). Check of rather low headspace. 

Link till Brewfather: https://share.brewfather.app/5QUXPtznizh5oL

Link till Ubidots, “One Hydrometer Reading” aaproach: https://iblopper.bubble-logger.com/wp-content/uploads/2021/03/image-5.png

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
?	11	0	0	1054	0
	11	1315	4	1050	10
	11	5400	21	1033	40		Y=0.0039	21
	11	11573	41	1013	86			45
	19	12600	45	1009	93			49
	20	13650	49	1005	101			53
	20	13746	49	1005	102			54
						53			5

The graph of the data for rG and Sum BPM/L:

Brew 29: “IPL”

MPU6050 sensor. OG=1042, FG=1006, 10L (13L Plastic Speidel Tank used). 

Link till Brewfather: https://share.brewfather.app/aBTQ6HmwLUnBLY

Link til Ubidots, One Hydrometer approach: https://iblopper.bubble-logger.com/wp-content/uploads/2021/02/IPL_.png

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
?	10	0	0	1042	0
?	16	545	3	1039	4
?	21	4128	25	1017	31		Y=0.0061x	25
?	20	6749	36	1006	50			41
						14			5

The graph of the data for rG and Sum BPM/L:

Brew 28: “NEIPA_Jan2021”

MPU6050 sensor. OG=1056, FG=1010, 21.8L (30L barrel used). 

Link till Brewfather: https://share.brewfather.app/dKQ4cD45E01YeR

Link til Ubidots, One Hydrometer approach: https://iblopper.bubble-logger.com/wp-content/uploads/2021/02/image-45.png

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1002	23	0	0	1056	0
1002	23	1035	14	1042	8		Y=0.0135x	14
1002	24	1327	18	1038	10			18
1004	25	2263	30	1026	17			31
1004	23	3055	40	1016	23			42
1002	22	3591	44	1012	27			49
1003	22	3661	46	1010	27			49
						16			3

The graph of the data for rG and Sum BPM/L:

Brew 27: “RockKilde Pilsner”

MPU6050 sensor. OG=1044, FG=1006 21.3L Mangrove Jack steel tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
985	10.5	0	0	1044	0
995	10.5	225	2	1042	2
995	10.5	462	5	1039	3
1006	10.5	3231	31	1013	24		Y=0,0096x	31
1003	18	3600	35	1009	27
1000	21	3730	36	1008	28
1000	21	3854	38	1006	29
1014	21	3975	38	1006	29			38
						9			0

The graph of the data for rG and Sum BPM/L:

Brew 26: “Sugarwort3”

MPU6050 sensor. OG=1045, FG=1016. 23L in 30L Plastic barrel.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1026	22.5	0	0	1045	0
1026	22.5	879	5	1040	7
1024	22.5	1467	11	1034	11		Y=0.0075x	11
1023	22.5	1623	12	1033	12			12
1018	21.5	2156	16	1029	16			16
1020	21.5	2596	21	1024	19			20
1019	21.5	2879	23	1022	21			22
1015	21.5	3253	26	1019	24			24
1007	21.5	3494	29	1016	26			26
						3			3

The graph of the data for rG and Sum BPM/L:

Brew 25: “Sugarwort 2”

MPU6050 sensor. OG=1030, FG=1004. 10.2L in 11L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
998	22	0	0	1030	0
998	22	852	6	1024	6
998	22	1972	14	1016	15		Y=0.0071x	14
998	22	2707	20	1010	20			19
998	22	3271	24	1006	24			23
998	22	3360	25	1005	25			24
1014	22	3502	26	1004	26			25
						0			1

The graph of the data for rG and Sum BPM/L:

Brew 24: “Sugarwort1”

MPU6050 sensor. OG=1030, FG=1004. 10.1L in 11L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1023	22	0	0	1040	0
1023	22	987	8	1032	7
1023	22	1973	14	1026	15		Y=0.0071x	14
1023	22	2758	20	1020	20			20
1018	22	4092	29	1012	30			29
1018	22	4735	33	1008	35			34
1018	22	5083	36	1005	38			36
1009	22	5450	38	1003	40			39
1009	22	5487	39	1002	41			39
						2			0

The graph of the data for rG and Sum BPM/L:

Brew 23: “Rhubar Wheat2020”

Sound detection – OG 1041; FG 1009. 16L in 25L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
	20	0	0	1041	0
	20	1131	12	1029	8	Y=0,0106x	12
	20	2456	24	1017	18		26
	20	3478	32	1009	26		37
						6		5

The graph of the data for rG and Sum BPM/L:

Brew 22: “Sweet Cold IPA”

Infared sensor. OG=1063, FG=1024. 22L in 30L Plastic barrel.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction	rG_corr	Error_corr
983	12	0	0	1063	0
983	12	489	5	1059	4
983	12	2322	13	1048	17		Y=0.0056x	13
999	12	4830	25	1038	36			27
999	12	6291	32	1031	47			35
999	12	7003	34	1029	52			39
?	12	7377	35	1028	55			41
?	15	7570	36	1027	56			42
?	18	7650	36	1027	57			43
?	21	7871	37	1026	58			44
?	21	7938	39	1024	59			44
						20			5

The graph of the data for rG and Sum BPM/L:

Brew 21: “CitLiMan_US05”

Sound detection – OG 1041; FG 1009. 10L in 12L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1014	18	0	0	1054	0
1015	18	1661	12	1042	12		Y=0.0072x	12
1016	18	3082	22	1032	23			22
1014	18	4841	32	1022	36			35
1012	20	6338	43	1011	47			46
1010	22	6389	44	1010	47			46
						3			2

The graph of the data for rG and Sum BPM/L:

Brew 20: “CitLiMan_MJ44”

Sound detection – OG 1052 FG 1013. 10L in 12L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1014	18	0	0	1052	0
1015	18	4678	37	1015	35		Y=0.0079x	37
1010	22	4877	39	1013	36			39
						3			0

The graph of the data for rG and Sum BPM/L:

Brew 19: “Sort Øl”

Sound detection – OG 1040 FG 1013. 26L in 30L Barrel.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1026	10	0	0	1040	0
1028	10	462	4	1036	3
1032	10	1212	11	1029	9		Y=0.0091*x	11
1030	10	2262	20	1020	17			21
1020	13	2701	25	1015	20			25
1014	17	2928	28	1012	22			27
						6			1

The graph of the data for rG and Sum BPM/L:

Brew 18: “Reuse-more”

Infrared detection – OG 1050; FG 1020. 10L in 12L Plastic Speidel Tank

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction	rG_corr	Error_corr
		0	0	1056	0
		714	13	1043	5		Y=0.0182	0
		1200	22	1034	9			13
		1646	29	1027	12			22
		2073	34	1022	15			30
		2166	35	1021	16			38
		2199	36	1020	16			39
		2205	38	1018	16			40
						22			2

The graph of the data for rG and Sum BPM/L:

Brew 17: “FNOE BIPA”

Sound detection – OG 1070; FG 1016. 21L in 25L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1026	19	0	0	1070	0
1026	18	1666	11	1059	12		Y=0.066x	11
1018	20	4628	31	1039	34			31
1017	20	6278	43	1027	46			41
1013	20	7147	50	1020	53			47
1020	20	7487	53	1017	55			49
1024	21	7511	54	1016	56			50
1026	21	7526	54	1016	56			50
						2		4

The graph of the data for rG and Sum BPM/L:

Brew 16: “Wit Lemon Ginger”

Infrared detection – OG 1050; FG 1020. 10L in 12L Plastic Speidel Tank. Bad taste = bad idea! 

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
?	18	0	0	1050	0
?	18	457	4	1046	12		Y=0.0088x	4
?	22	3551	30	1020	34			31
						4			1

The graph of the data for rG and Sum BPM/L:

Brew 15: “Yoga Pils 3”

Inferred detection – OG 1040 FG 1013. 25L in 30L Barrel.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1030	10	0	0	1041	0
1028	10	808	7	1034	6		Y=0.086x	7
1032	10	3030	28	1014	22			26
1014	16	3678	31	1010	27			32
1020	20	4189	33	1008	31			36
						2			3

The graph of the data for rG and Sum BPM/L:

Brew 14: “Sugar Blue 2”

Infrared detection – OG 1026; FG 1002. 10L in 12L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1015	21	0	0	1026	0
1014	21	257	2	1025	2
1010	21	1182	10	1016	9		y=0.0085x	10
1012	21	2230	18	1008	17			19
1014	21	2504	22	1004	19			21
1015	21	2600	24	1002	19			22
1015	21	2618	24	1002	19			22
						5			2

The graph of the data for rG and Sum BPM/L:

Brew 13: “Sugar Blue 3”

Infrared detection – OG 1026; FG 1002. 10L in 12L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1015	21	0	0	1026	0
1014	21	604	6	1020	4
1010	21	1260	10	1016	9		y=0.0079x	10
1012	21	1786	13	1013	13			14
1014	21	2313	17	1009	17			18
1015	21	2447	19	1007	18			19
						1		0

The graph of the data for rG and Sum BPM/L:

Brew 12: “Re-use Agian”

Infrared detection – OG 1057; FG 1018. 10L in 12L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1015	21	0	0	1057	0
1014	21	1989	16	1041	15		Y=0.0080x	16
1010	21	4429	33	1024	33			35
1012	21	5071	36	1021	38			41
1014	21	5209	38	1019	39			42
1015	21	5329	39	1018	39			43
						0			4

The graph of the data for rG and Sum BPM/L:

Brew 11: “NEIPS PIF2 (sound)”

Sound detection – OG 1052; FG 1010. 20L in 25L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1023	17	0	0	1052	0
1036	18	5050	38	1014	37		Y=0.0075x	38
1040	18	5930	42	1010	44			44
1039	20	6077	42	1010	45			46
						3			4

The graph of the data for rG and Sum BPM/L:

Brew 10: “NEIPS PIF2 (infrared)”

Sound detection – OG 1052; FG 1010. 20L in 25L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1023	17	0	0	1052	0
1036	18	4900	38	1014	36		Y=0.0078x	38
1040	18	5850	42	1010	43			46
1039	20	5885	42	1010	44			46
						2			4

The graph of the data for rG and Sum BPM/L:

Brew 9: “Rå Hvede”

Infared detection – OG 1052; FG 1018. 15L in 25L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1007	18	0	0	1052	0
1007	18	1111	10	1042	8		Y=0.0090x	10
1010	18	1989	16	1036	15			18
1010	18	2626	22	1030	19			24
1003	20	3569	28	1024	26			32
1008	20	3992	32	1020	30			36
1010	20	4138	34	1018	31			37
1014	20	4190	34	1018	31			38
						3			4

The graph of the data for rG and Sum BPM/L:

Brew 8: “BrookVer2”

Sound detection – OG 1053 FG 1023. 23L in 30L Barrel.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1028	10	0	0	1053	0
1017	10	155	2	1051	1
1017	10	550	6	1047	4
1017	10	738	7	1046	5
1015	10	1750	14	1039	13		Y=0.0080x	14
1015	10	2562	20	1033	19			20
1005	10	3431	26	1027	25			27
989	11	3668	28	1025	27			29
994	15	3784	29	1024	28			30
998	17	3850	29	1024	28			31
995	17	3908	30	1023	29			31
						1			1

The graph of the data for rG and Sum BPM/L:

Brew 7: “Azzca IPA”

Sound detection – OG 1064; FG 1017. 15L in 25L Plastic Speidel Tank

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1019	18	0	0	1064	0
1015	20	4049	36	1028	30		Y=0.0089x	36
1011	20	5054	41	1023	37			45
1011	20	6600	47	1017	49			59
						2			12

The graph of the data for rG and Sum BPM/L:

Brew 6: “Yoga Pils”

Sound detection – OG 1049 FG 1013. 23L in 30L Barrel.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
993	12	0	0	1049	0
996	11,5	298	2	1047	2
999	12	1209	9	1040	9		Y=0.0074xx	9
1000	12	1720	14	1035	13			13
999	12	2738	22	1027	20			20
1002	12	4003	29	1020	30			30
1003	12	4378	33	1016	32			32
1003	12	4491	34	1015	33			33
1004	16	4785	35	1014	35			35
1002	21	5087	36	1013	38			38
						2			2

The graph of the data for rG and Sum BPM/L:

Brew 5: “Bagge Brooklyn”

Sound detection – OG 1064; FG 1017. 14L in 25L Plastic Speidel Tank

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1008	17	0	0	1054	0
1006	17	2220	19	1035	16		Y=0.0086x	19
1006	17	3300	27	1027	24			28
1006	17	4138	31	1023	31			36
1010	20	4362	32	1022	32			38
1018	20	4570	34	1020	34			39
1019	20	4908	35	1019	36			42
1019	20	5228	37	1017	39			45
						2			6

The graph of the data for rG and Sum BPM/L:

Brew 4: “Rå Wiess”

Sound detection – OG 1050; FG 1016. 15L in 25L Plastic Speidel Tank

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
990	19	0	0	1050	0
994	19	2376	20	1030	18		Y=0.0084x	20
997	20	3811	26	1024	28			33
1000	22	4576	32	1018	34			39
1003	22	4904	34	1016	36			42
					2				8

The graph of the data for rG and Sum BPM/L:

Brew 3: “REUSE NEIPA HOPS”

Sound detection – OG 1052; FG 1012. 16L in 25L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1014	19	0	0	1052	0
1009	18	1650	12	1040	12		Y=0.0072x	12
1018	20	4488	30	1022	33			32
1025	20	5525	37	1015	41			40
1014	20	6289	40	1012	47			45
					7				5

The graph of the data for rG and Sum BPM/L:

Brew 2: “RAW NEIPA”

Sound detection – OG 1052; FG 1010. 20L in 25L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1013	19	0	0	1052	0
1009	22.5	1743	16	1035	13		Y=0.0092x	16
1017	20	4368	35	1017	32			40
1019	22	5178	40	1012	38			48
1014	22	5491	42	1010	41			50
					1				8

The graph of the data for rG and Sum BPM/L:

Brew 1: “SW Clone”

Sound detection – OG 1052; FG 1010. 18L in 25L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1010	21	0	0	1056	0
1006	22	1300	8	1048	10		Y=0.0062x	8
1007	21	3095	23	1033	23			19
1010	21	4950	34	1022	37			31
1011	21	4984	34	1022	37			31
						3			3

The graph of the data for rG and Sum BPM/L:

Brew 0: “Hooded Kølsch”

Sound detection – OG 1049; FG 1013. 20L in 25L Plastic Speidel Tank.

hPa	Temp	Sum BPM/ L	rG	Gravity	Y=0.0074*x	Error	Correction “One hydrometer reading”	rG_corr	Error_corr
1011	18	0	0	1049	0
1013	18	1608	10	1039	12		Y=0.0062x	10
1013	18	1955	14	1035	14			12
1009	18	2294	17	1032	17			14
1008	18	3038	21	1028	22			19
1008	18	3589	25	1024	27			22
1008	18	4440	30	1019	33			28
1007	18	5032	33	1016	37			31
1007	18	5106	33	1016	38			32
1004	18	5321	34	1015	39			33
1010	18	5517	36	1013	41			34
						5			2

The graph of the data for rG and Sum BPM/L: