SKU: 95966293170

Heathrow Scientific 6754HTS API ASTM Hydrometer, with Thermometer, ASTM 54H, API 29 to 41°, 1/pk

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Description

Heathrow Scientific 6754HTS API ASTM Hydrometer, with Thermometer, ASTM 54H, API 29 to 41°, 1/pkAPI scale hydrometers measure the scale which was selected in 1921 by the American Petroleum Institute (API), the U. S. Bureau of Mines, and the National Institute of Standards and Technology (NIST) as the standard hydrometer scale for petroleum products. The API scale is based on the following formula: API @ 60F = 141. 5 (Specific Gravity @ 60F) 131. 5 The thermometer scale (where applicable) for these thermo hydrometers is located in the body. All

API scale hydrometers measure the scale which was selected in 1921 by the American Petroleum Institute (API), the U.S. Bureau of Mines, and the National Institute of Standards and Technology (NIST) as the standard hydrometer scale for petroleum products.
The API scale is based on the following formula: °API @ 60°F = 141.5/(Specific Gravity @ 60°F) - 131.5
The thermometer scale (where applicable) for these thermo-hydrometers is located in the body. All instruments are suitable for certification for use as a primary reference with NIST traceability.

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SKU: 95966293170

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EMG
West Palm Beach, US
★★★★★ 1
Stopped working
Maybe it's a one-off but it stopped working very shortly after I received it and I had to return it. Casio used to be a good brand.
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Reviewed in the United States on December 21, 2025
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Shawn Houston
Draper, US
★★★★★ 3
light not strong enough
light not strong enough
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Reviewed in the United States on February 3, 2023
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S. Marie
New York, US
★★★★★ 5
Great watch!
I like how thin & lightweight it is. The blue numbers makes the watch more appealing!!
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Reviewed in the United States on July 8, 2019
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J. Rosett
Lake Worth, US
★★★★★ 5
Just what I wanted
I am an invalid and spend a lot of time watching tv in the dark, so I wanted a watch I could read in the dark. It isnt very bright but enough to be able to read it and it is also large enough to read easily. It is not beautiful but is good looking enough to wear when going out. It is just what I needed and I am satisfied with it.
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Reviewed in the United States on August 11, 2019
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DrEAM
Grantham, US
★★★★★ 5
Super soft, runs small, long tail
High quality, super soft, good neck height, nice price, ready to go right out of the dryer, medium thick material, works well under a sport coat or sweat shirt, snug fit--runs about one size small. Length is about four inches too long. So, ideally made for tall and skinny people (I am short and thick), but going one size up works fine for me except have to tuck it in due to the length.
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Reviewed in the United States on December 26, 2025

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