{"product_id":"vee-gee-675xhts-api-astm-thermo-hydrometer-series-52h-57h","title":"VEE GEE API ASTM Thermo-Hydrometers - 675xHTS Series | ASTM 52H–57H with Thermometer","description":"\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eVEE GEE 675xHTS are ASTM\/API Thermo-Hydrometers — borosilicate glass instruments combining an API gravity scale with a built-in thermometer in the body, 15 in (38 cm) overall length. The API scale is the petroleum industry standard for density measurement, selected by the American Petroleum Institute, the U.S. Bureau of Mines, and NIST. Six models (ASTM 52H–57H) cover the full API gravity range from 9° to 71° in overlapping 10° increments at 0.1° API resolution. The built-in 0–150°F thermometer (2°F subdivisions) allows simultaneous temperature measurement for applying the temperature correction required by ASTM D1298 \/ IP 160 crude oil and petroleum products density procedures. All calibrated at 15°C (60°F). Made in USA. Select the ASTM number covering your API gravity range.\u003c\/p\u003e\n\n\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003eModel Selection — ASTM Number \u0026amp; API Gravity Range\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto my-4\"\u003e\n \u003ctable class=\"min-w-full text-left text-sm border-collapse border border-gray-300\"\u003e\n \u003cthead class=\"bg-gray-100 font-semibold\"\u003e\n \u003ctr\u003e\n \u003cth class=\"p-2 border border-gray-300\"\u003eSKU\u003c\/th\u003e\n \u003cth class=\"p-2 border border-gray-300\"\u003eASTM No.\u003c\/th\u003e\n \u003cth class=\"p-2 border border-gray-300\"\u003eAPI Range\u003c\/th\u003e\n \u003cth class=\"p-2 border border-gray-300\"\u003eTypical Petroleum Products\u003c\/th\u003e\n \u003c\/tr\u003e\n \u003c\/thead\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e6752HTS\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e52H\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e9 to 21° API\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eHeavy fuel oils, residual fuels (SG ~1.00–0.93)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e6753HTS\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e53H\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e19 to 31° API\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eDiesel, heating oil, crude oil (SG ~0.93–0.87)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e6754HTS\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e54H\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e29 to 41° API\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eKerosene, jet fuel, light crude (SG ~0.88–0.82)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e6755HTS\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e55H\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e39 to 51° API\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eGasoline, naphtha (SG ~0.82–0.78)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e6756HTS\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e56H\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e49 to 61° API\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eLight naphtha, ligroin (SG ~0.78–0.74)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e6757HTS\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e57H\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e59 to 71° API\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eVery light naphtha, light petroleum ether (SG ~0.74–0.70)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul class=\"marker:text-quiet list-disc\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cstrong\u003eAPI Gravity Scale — Petroleum Industry Standard:\u003c\/strong\u003e The API gravity scale (°API = 141.5\/SG@60°F − 131.5) was selected as the standard measurement for petroleum products by the American Petroleum Institute, the U.S. Bureau of Mines, and NIST. Higher °API indicates lower density (lighter product). These instruments are appropriate for ASTM D1298 and IP 160 petroleum density measurement procedures.\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cstrong\u003eBuilt-In Thermometer (0–150°F, 2°F subdivisions):\u003c\/strong\u003e The thermometer is located inside the body of the hydrometer. Temperature is measured simultaneously with the API gravity reading — essential for applying the temperature correction factors in ASTM petroleum tables, since API gravity at observed temperature must be corrected to the standard 60°F reference.\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cstrong\u003e0.1° API Subdivisions — High Resolution:\u003c\/strong\u003e Each graduation represents 0.1° API — the standard precision for petroleum product grading and custody transfer measurements.\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cstrong\u003eCalibrated at 15°C (60°F):\u003c\/strong\u003e Factory-calibrated at the petroleum industry standard reference temperature.\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cstrong\u003e15 in (38 cm) Overall Length:\u003c\/strong\u003e Full-size ASTM petroleum hydrometer format for stable readings in standard petroleum sampling containers and hydrometer cylinders.\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cstrong\u003eBorosilicate Glass Construction:\u003c\/strong\u003e Chemically resistant to petroleum products; transparent for unambiguous meniscus reading.\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\u003cstrong\u003eMade in USA — 1-Year Warranty.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eWhat is the API gravity formula and how does it relate to specific gravity?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4\"\u003e\n°API @ 60°F = (141.5 \/ SG@60°F) − 131.5. API gravity increases as density decreases — a light gasoline at SG 0.72 is approximately 65°API, while a heavy crude at SG 1.00 is 10°API. To convert back: SG = 141.5 \/ (°API + 131.5). The API scale was designed so that water is exactly 10°API at 60°F (SG 1.000).\u003c\/p\u003e\n\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eWhy do I need the built-in thermometer?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4\"\u003e\nPetroleum density changes significantly with temperature — approximately 0.0006–0.0007 SG per °F for most distillates. ASTM D1298 requires that the observed hydrometer reading be corrected to the reference temperature of 60°F using published volume correction tables (ASTM Table 6B or equivalent). The thermometer reading at the time of the hydrometer reading is required to apply this correction. The HTS thermo-hydrometer captures both measurements in one operation.\u003c\/p\u003e\n\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eHow do I select the correct ASTM number?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4\"\u003e\nChoose the model whose API range covers the expected API gravity of your product, ideally with your typical reading near the center of the range. The ranges overlap by 2° at each boundary — for example, 52H covers 9–21° and 53H covers 19–31°, so a 20°API reading could be made with either. If your product frequently reads near a range boundary, select the model where that reading falls near the center for best graduation spacing and readability.\u003c\/p\u003e\n\n\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003eOrdering\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eAuthorized dealer, ships from USA inventory. Serving academic, government, and research laboratories nationwide.\u003c\/p\u003e","brand":"VEE GEE","offers":[{"title":"ASTM 52H — API 9 to 21°","offer_id":48100712841448,"sku":"6752HTS","price":60.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/5361\/1240\/files\/unnamed_492f3d7f-75dd-4ecb-a0ec-fb7cb70e78c1.jpg?v=1772754349","url":"https:\/\/labsupplies.com\/products\/vee-gee-675xhts-api-astm-thermo-hydrometer-series-52h-57h","provider":"LabSupplies.com","version":"1.0","type":"link"}