APIAPI Hydrometers

API Hydrometer: API ASTM Combined Form, 59/71, 0.1, Glass

The API Hydrometer is an API ASTM Combined Form hydrometer with a 59/71 range and 0.1 scale divisions, featuring a +30 / 180ºF Mercury Thermometer. This glass instrument has a 15-inch overall height and is identified…

SKU 3G-OTH-368879

Brand

API

Item

Hydrometer: API ASTM Combined Form, 59/71, 0.1, Glass

Local availability & support — Singapore

Local office: 20 Woodlands Link #09-05, Singapore 738733
Phone: +65 8878 8355
Delivery: Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment: Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to: Singapore

Technical Specifications

API

Manufacturer Part Number

GW057HM 

Range

59/71 

Features

+30 / 180ºF Mercury Thermometer 

Scale Type

API ASTM Combined Form 

Scale Divisions

0.1

Technical Documents

No technical documents available for this product.

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API Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Frequently Asked Questions

What is the API Hydrometer used for?

The API Hydrometer 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 allow direct temperature-compensated readings in laboratory or field testing environments.

What are the specifications of the API Hydrometer?

This API ASTM Combined Form hydrometer has a range of 59/71 with 0.1 scale divisions. It includes a +30 / 180ºF mercury thermometer, is made of glass, and has a 15-inch overall height. The manufacturer part number is GW057HM.

Where to buy the API Hydrometer worldwide?

3G Electric supplies the API Hydrometer (GW057HM) worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time.

How to use the API Hydrometer correctly?

Ensure the hydrometer and sample are at the same temperature before immersion. Gently lower the glass instrument into the test jar, spin to release air bubbles, and read the scale at the bottom of the meniscus. The built-in mercury thermometer provides simultaneous temperature measurement.

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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