What is the precision(accuracy) of the PH measurement?
1630628
we have been very happy with our pH tester. It needs to be calibrated occasionally but for the most part stays in calibration fairly well. It's easy to recalibrate and easy to use. We are happy with the tester
1630629
FROM HM DIGITAL: The accuracy of the PH-80 is + / - 2%. It is factory calibrated to pH 7.0. The meter can be easily re-calibrated with digital calibration to pH 4.0, 7.0 or 10.0. All pH meters should be calibrated anywhere from before every use to at least once a month. The frequency of calibration depends on usage and application, but you should calibrate at least once per month for proper results and a longer lifespan of your meter. A free packet of pH 7.0 buffer is included with the meter. Additional pH buffers for calibration are available for purchase. For more information, please visit www.tdsmeter.com/products/ph80.html
1630630
FROM HM DIGITAL: The accuracy of the PH-80 is + / - 2%. It is factory calibrated to pH 7.0. The meter can be easily re-calibrated with digital calibration to pH 4.0, 7.0 or 10.0. All pH meters should be calibrated anywhere from before every use to at least once a month. The frequency of calibration depends on usage and application, but you should calibrate at least once per month for proper results and a longer lifespan of your meter. A free packet of pH 7.0 buffer is included with the meter. Additional pH buffers for calibration are available for purchase. For more information, please visit www.tdsmeter.com/products/ph80.html FROM HM DIGITAL: The accuracy of the PH-80 is + / - 2%. It is factory calibrated to pH 7.0. The meter can be easily re-calibrated with digital calibration to pH 4.0, 7.0 or 10.0. All pH meters should be calibrated anywhere from before every use to at least once a month. The frequency of calibration depends on usage and application, but you should calibrate at least once per month for proper results and a longer lifespan of your meter. A free packet of pH 7.0 buffer is included with the meter. Additional pH buffers for calibration are available for purchase. For more information,... » Read More FROM HM DIGITAL: The accuracy of the PH-80 is + / - 2%. It is factory calibrated to pH 7.0. The meter can be easily re-calibrated with digital calibration to pH 4.0, 7.0 or 10.0. All pH meters should be calibrated anywhere from before every use to at least once a month. The frequency of calibration depends on usage and application, but you should calibrate at least once per month for proper results and a longer lifespan of your meter. A free packet of pH 7.0 buffer is included with the meter. Additional pH buffers for calibration are available for purchase. For more information, please visit www.tdsmeter.com/products/ph80.html « Show Less
2011885
I've measured it as high as a ph of 10, but it depends on the state of the incoming water and how filtered it is before it hits the machine as well as the internal filter.
1369675
This device has no temperature compensation mechanisms. If I recall, it suggests that pH values should be measured at "room temperature," however vague such a statement is.
2120030
FROM HM DIGITAL: No, it does not. The COM-100 measures TDS (Total Dissolved Solids), EC (Electrical Conductivity) and temperature. To measure pH, you will need a pH meter, such as HM Digital's PH-200 (made by HM Digital, not Hydrofarm - that's a typo) or PH-80.
860340
Not sure. I have the BP4M, it is pretty accurate, + or - within 5 points of a manual BP. I hope that helps a little.
1189328
The one I have is fairly accurate. Measured water in a 5 gal bucket, but have not tried verifying using a container with measurement lines on it.
956224
I don't calibrate the meter. It works right out of the box for humidity level. I do not use the ph meter or the light meter. May be you can stick in in vinegar and see if it reads about 3
1491488
For correct cyanuric acid (stabilizer) reading, the ph and alkalinity will need to be within range.
253780
I'm sorry, I don't know anything about the ph. I have been using the DMEA in my face creams and I am very happy with the product.
132087
The ph does not change. You can pick up a test kit at WalMart in the pet department to check your ph levels of your water. It will tell you if it is acidic or alkaline. Then test it again after running it through the filter. Mine stays acidic as I have soft water.
904209
FROM HM DIGITAL: The PH-200 is an ideal, waterproof pH meter for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water as well as other liquids. It should NOT be used for testing distilled water or acids, as they may damage the sensor. It also should NOT be used to test solids, including soil. For more information, please visit www.tdsmeter.com/products/ph200.html
2093960
Very. It's accurate for grams even to an acceptable degree. (I was just weighing some change.)
1049007
Youre right, the PH range is 0-14. the picture reads 18.3 because the meter was turned on without being submerged in anything.
440854
Im not sure what the optimal ph is but, i have 2 clone king machines and i put in water with a ph of 5.6 to 5.8 just like my hydro stuff, and i havent lost 1 clone in 6 batches of clones
755561
a standard litmus kit cannot accurately test the pH of water due to the chemical traces on the strip and reaction process. Having said that this pH does reliably test at 9.5
1667330
It does not need calibration but you must let it stay in soil undisturbed for minimum of 5 minutes until it displays final PH reading and the PH range is less than 5 and above 7
2120028
No it does not. There is a product from the same manufacturer that check PH. here is a link HMD PH-200 Digital Professional Waterproof 0-14 PH & Temperature Meter