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API Hydrometer: API ASTM Combined Form, 39/51, 0.1 - API Hydrometers
APIAPI Hydrometers

API Hydrometer: API ASTM Combined Form, 39/51, 0.1

The API Hydrometer, model GW055HH, is an API ASTM Combined Form hydrometer with a range of 39/51 and scale divisions of 0.1. It features a +60 / 220ºF Mercury Thermometer and has an overall height of 15 inches.

SKU 3G-OTH-368858

Brand
API
Item
Hydrometer: API ASTM Combined Form, 39/51, 0.1
Category
API Hydrometers
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Technical Specifications

API
Manufacturer Part Number
GW055HH
Range
39/51
Features
+60 / 220ºF Mercury Thermometer
Scale Type
API ASTM Combined Form
Scale Divisions
0.1
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API Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The API Hydrometer, model GW055HH, is an API ASTM Combined Form hydrometer with a range of 39/51 and scale divisions of 0.1. It features a +60 / 220ºF Mercury Thermometer and has an overall height of 15 inches.

Frequently Asked Questions

What is the API Hydrometer GW055HH used for?

The API Hydrometer GW055HH is used to measure the specific gravity of petroleum products and crude oils per ASTM standards. Its combined form scale and built-in mercury thermometer (+60 to 220°F) allow direct temperature-compensated readings in refineries, labs, and fuel blending operations.

What are the specifications of the API Hydrometer GW055HH?

The API Hydrometer GW055HH has a range of 39/51 API, scale divisions of 0.1, and an API ASTM Combined Form scale type. It includes a +60 to 220°F mercury thermometer and an overall height of 15 inches. The manufacturer part number is GW055HH.

Where to buy the API Hydrometer GW055HH worldwide?

3G Electric supplies the API Hydrometer GW055HH worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time.

How to select the correct API hydrometer for ASTM testing?

Select an API hydrometer that matches your expected specific gravity range and includes a built-in thermometer for temperature correction. The GW055HH covers 39/51 API with 0.1 divisions and a +60/220°F thermometer, suitable for light to medium crude oils. Verify the scale type matches your test method.

Used in

Common applications for API
Petroleum refining — API ASTM Plain Form hydrometers (e.g., range 19/31) for measuring crude oil gravity during distillation
Fuel blending — API Combined Form hydrometers (e.g., range 39/51) with thermometer for real-time density checks in gasoline blending
Marine fuel handling — API hydrometers (e.g., range 40/80) for verifying bunker fuel API gravity at storage terminals
Quality control labs — API ASTM Plain Form hydrometers (e.g., range 49/61) for routine testing of light distillates
Field testing — API Combined Form hydrometers (e.g., range 29/41) for portable density measurement in pipeline sampling
Petrochemical production — API hydrometers (e.g., range 15/21) for monitoring solvent density in chemical processing

API Products

3G Electric supplies API api hydrometers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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