Unitec 74274 Battery Hydrometer Hydro Volts

Not delicate as other glass cubes testers. Compact. 1 full squeeze of the bulb and the chamber is full, I always fill it twice as I feel it is more accurate. Little pricey, but I think it'll be around for a while.

I think these are made in Germany, but not sure. Ten years ago, I bought one marked with the Hella brand name. It was blue. This one is identical but red and marked with Midnite. I guess the maker sells these to various retail companies for promotional purposes. Right now Midnite has the franchise. It is a very good and precise device. The black squeeze bulb lasted ten years with testing 60 battery cells every 60 days before it developed a small air leak and would no longer draw enough acid into the test chamber to make accurate readings - so that probably somewhat over 10,000 bulb-squeezes. I will buy another one in ten years.

Living off- grid and maintaining a battery bank requires a good hydrometer. I have tried several different models and found this style to be of my liking. I find it easy to use and the numbers are clear and easy to read. It does cost a little more but worth the price. I highly recommend.

This hydrometer is easy to use, but you do have to be careful to squeeze the bulb enough so the meter dials are completely flooded with the battery acid being tested. It is best to release the bulb slowly to allow the vacuum to pull the acid into the meter. If the dials are not completely flooded the reading will not be accurate. I compared it with standard glass tube type hydrometer and found the readings to be comparable. Once the two dials stop moving you can then read the specific gravity of the battery acid. You don’t have worry about temperature compensation as it it automatic. I do recommend flushing the meter with distilled water when done using it. I can’t say I’d recommend it for heavy commercial use, but for the average homeowner, and perhaps for a small business, who needs to check lead acid batteries used for typical sump pump backup applications, campers, boats, and such, I think it’s ideal.

Works a lot faster than the old one drop hydrometer. Left over moisture after rinsing is a concern.

I can't figure out why this style hydrometer has not completely replaced the glass tube type hydrometers. Temp compensated automatically, easy to read, no glass float to stick to side of glass tube which can cause reading errors, accuracy appears to match that of a quality glass tube type hydrometer when it is done correctly, well made. It is expensive, and the glass tube types are so cheap, but this is truly a joy to use. I trust the reading from this over the glass tube style hydrometers.

The packing needs improvement, however the product was not damage even though the box was somewhat damaged.

Very accurate but do not leave it out in the sun or the gauge colors will fade. Otherwise, it works very good and very accurate. I stow one in my RV full time now and another in the garage/shop.

Lo q buscaba para una batt de ácido

I recently purchased two Hydro Volts hydrometers and one ATC 4-in 1 refractometer to measure battery acid specific gravity in order to adjust battery charging parameters. I suspected that all these instruments were quite a bit inaccurate because they all gave different results. It turns out most hydrometers and refractometers give results with errors that are way too large especially when charging large expensive batteries. One Hydro Volts hydrometer gives results that are .017 lower than expected. Another Hydro Volts hydrometer gives me results that are .003 higher than expected. The 4-in ATC refractometer gives me results that are .010 higher than expected. To identify the accuracy error, I compared the results with a very high precision weight scale. I measured the actual specific gravity of the acid using a high pre cision weight scale. You measure the weight of a known volume of distilled water and compare it with the weight of the same volume of acid. The weight of the acid divided by the weight of the same volume of distilled water gives you a very precise value of the actual specific gravity. All the hydrometers and refractometers can be used but should be corrected for their specific errors. I think it is especially important to do so when charging large expensive batteries. I encourage everyone to make the same tests and make sure they test the accuracy of their hydrometers and refractometers. Charging batteries incorrectly causes battery damage and premature failure. For large and expensive lead acid batteries, It is very important to charge them very accurately by measuring the specific gravity very accurately.

Nachdem ich ihn das erste Mal benutzte, wollte ich schon eine schlechtere Bewertung schreiben. Habe auch den ersten Versuch die Anzeige für die Skala nicht entdecken können. Dann schon. Man kann (soweit die Batterie es erlaubt) wunderbar den Säuregehalt messen und entsprechend "einstellen". Funktioniert top. Auch der Saugschlauch ist meines Erachtens lang genug.

Un sistema muy grafico y fácil de leer, me gusto mucho.

alles ok.