APIAPI Hydrometers

API Hydrometer: API Plain Form, 19/31, 0.2

The API Hydrometer is an API Plain Form hydrometer with a range of 19/31 and scale divisions of 0.2. It has a 6-inch overall height and is identified by manufacturer part number GW2503.

SKU 3G-OTH-368875

Also listed as: GW 2503 · GW-2503

Brand

API

Item

Hydrometer: API Plain Form, 19/31, 0.2

Local availability & support — the Philippines

Delivery: 5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment: Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to: Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

API

Manufacturer Part Number

GW2503 

Range

19/31 

Scale Type

API Plain Form 

Scale Divisions

0.2

Technical Documents

No technical documents available for this product.

Request documentation →

Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.

Talk to an engineer

Ask a question

API Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

The API Hydrometer is an API Plain Form hydrometer with a range of 19/31 and scale divisions of 0.2. It has a 6-inch overall height and is identified by manufacturer part number GW2503.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is an API hydrometer used for?

An API hydrometer measures the specific gravity of petroleum products and liquids. It is used in refineries, fuel testing labs, and industrial plants to determine API gravity, which indicates the density of crude oil or fuels relative to water.

What are the specifications of the API Hydrometer GW2503?

The API Hydrometer GW2503 has an API Plain Form scale type, a range of 19/31, and scale divisions of 0.2. It features a 6-inch overall height and is manufactured by API under part number GW2503. This hydrometer is designed for precise density measurement of petroleum liquids.

Where to buy API Hydrometer GW2503 worldwide?

You can source the API Hydrometer GW2503 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply this API hydrometer to customers across multiple industries.

How to select the right API hydrometer for fuel testing?

Select an API hydrometer based on the expected API gravity range of your fuel. The GW2503 covers 19/31 with 0.2 divisions, suitable for medium-density petroleum products. Ensure the hydrometer is clean and at the correct temperature before use. For specific applications, consult the API standard or your lab protocol.

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.

Browse all API products →Contact our engineers →