--- product_id: 48747173 title: "Unitec 74274 Battery Hydrometer Hydro Volts" brand: "unitec" price: "S/.670" currency: PEN in_stock: true reviews_count: 5 category: "Unitec" url: https://www.desertcart.pe/products/48747173-unitec-74274-battery-hydrometer-hydro-volts store_origin: PE region: Peru --- # Large, precise scale 360° rotatable twin measuring device Hydrostatic barrier prevents leakage Unitec 74274 Battery Hydrometer Hydro Volts **Brand:** unitec **Price:** S/.670 **Availability:** ✅ In Stock ## Summary > 🔋 Charge smarter, not harder — precision testing that powers your performance! ## Quick Answers - **What is this?** Unitec 74274 Battery Hydrometer Hydro Volts by unitec - **How much does it cost?** S/.670 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/48747173-unitec-74274-battery-hydrometer-hydro-volts) ## Best For - unitec enthusiasts ## Why This Product - Trusted unitec brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Handling:** 360° rotatable design means no need to hold the device perfectly vertical—test anywhere, anytime. - • **Leak-Free Confidence:** Innovative hydrostatic barrier stops acid leakage and air trapping for safer use. - • **Precision You Can Trust:** Engineered in Germany for unmatched accuracy in lead-acid battery testing. - • **Readability at a Glance:** Large, easy-to-read scale ensures quick and confident measurements every time. - • **Temperature-Resilient Suction:** Elastic suction ball works flawlessly across all temperatures, eliminating annoying tapping. ## Overview The Unitec 74274 Battery Hydrometer Hydro Volts is a precision German-engineered tool designed for accurate measurement of acid density and charge state in lead-acid batteries. Featuring a large, easy-to-read scale, a 360° rotatable twin measuring device, and a hydrostatic barrier to prevent leakage, it ensures reliable, safe, and effortless battery testing across all temperatures. ## Description Unitec 74274 battery acid tester Hydrovolt, measuring device for acidity. Checks state of charge and acid density of all lead-acid batteries. Large, precisely readable scale, suction ball at all temperatures elastic and functional. Hydrostatic barrier automatically prevents any leakage and trapping of air. The twin measuring device on which the scale is mounted, is 360° rotatable, measuring instrument does not have to be held vertically. Intake system prevents blistering annoying tapping no longer necessary. Precision equipment.Made in Germany. Contents Review: Lo q buscaba para una batt de ácido Review: 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. ## Features - For lead acid batteries. - Large scale. - Hydrostatic barrier. - Precision equipment, - Made in Germany. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B007CW8Y9S | | Brand | Unitec | | Customer Reviews | 4.3 4.3 out of 5 stars (205) | | Date First Available | 3 July 2013 | | Item Weight | 115 g | | Item model number | 74274 | | Manufacturer | Unitec | | Manufacturer part number | 74274 | | Product Dimensions | 4 x 10.5 x 18 cm; 115 g | ## Images ![Unitec 74274 Battery Hydrometer Hydro Volts - Image 1](https://m.media-amazon.com/images/I/71ANQaoqnzL.jpg) ![Unitec 74274 Battery Hydrometer Hydro Volts - Image 2](https://m.media-amazon.com/images/I/8195yxjmVrL.jpg) ![Unitec 74274 Battery Hydrometer Hydro Volts - Image 3](https://m.media-amazon.com/images/I/81MTgx-VARL.jpg) ## Questions & Answers **Q: How do you read this thing? There is no arrow or other marking that acts as a guide.** A: There are two disks that rotate independently. I believe one is for automatic temperature compensation & the other is the specific gravity. When you take a specific gravity measurement, it will be obvious. Suck in enough battery "water" to cover the discs. It really is a brilliantly designed hydrometer, so much better than the glass tube & float type where you have to calculate the SG based on the temperature compensation read on the thermometer. **Q: You squeeze the electrolyte back into the cell after testing right? And do you have to rinse it out before taking the next reading?** A: Yes, replace the electrolyte. Once out and you move to the next cell squeeze the bulb and suck in the new electrolyte three times to mix out any remaining electrolyte. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by J***Z on 10 April 2022* Lo q buscaba para una batt de ácido ### ⭐⭐⭐ Review *by L***S on 8 April 2023* 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. ### ⭐⭐⭐⭐⭐ Review *by T***B on 5 November 2017* 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. ## Frequently Bought Together - Unitec 74274 Battery Hydrometer Hydro Volts - Mighty Max Battery Golf Cart/Deep Cycle Battery Hydrometer Tester - EZRED SP101 Battery Hydrometer, Factory --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pe/products/48747173-unitec-74274-battery-hydrometer-hydro-volts](https://www.desertcart.pe/products/48747173-unitec-74274-battery-hydrometer-hydro-volts) --- *Product available on Desertcart Peru* *Store origin: PE* *Last updated: 2026-05-17*