Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
API Hydrometer: API ASTM Plain Form, 19/31°, 0.1°, Ballast/Glass, +/-0.1° - API Hydrometers
APIAPI Hydrometers

API Hydrometer: API ASTM Plain Form, 19/31°, 0.1°, Ballast/Glass, +/-0.1°

The API Hydrometer: API ASTM Plain Form (SKU 3G-OTH-368890) is an API hydrometer with a 19/31° range and 0.1° scale divisions. It features a 0 to 150ºF thermometer and a ballast/glass construction with ±0.1°…

SKU 3G-OTH-368890

Also listed as: B618980000 · B61898 0000

Brand
API
Item
Hydrometer: API ASTM Plain Form, 19/31°, 0.1°, Ballast/Glass, +/-0.1°
Part Number
B61898-0000
Category
API Hydrometers
Available to Order
Also known as:B61898-0000API
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

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
B61898-0000
Type
19/31°, 0.1°, Ballast/Glass, +/-0.1°
Range
19/31°
Features
0 to 150ºF Thermometer
Overall Ht
13 in
Scale Type
API ASTM Plain Form
Scale Divisions
0.1°

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: API ASTM Plain Form (SKU 3G-OTH-368890) is an API hydrometer with a 19/31° range and 0.1° scale divisions. It features a 0 to 150ºF thermometer and a ballast/glass construction with ±0.1° accuracy, measuring 13 inches overall height. This instrument is designed for API gravity measurement per ASTM standards.

Frequently Asked Questions

What is an API hydrometer used for?

An API hydrometer measures the API gravity of petroleum liquids, indicating their density relative to water. This plain-form ASTM model is used in refineries, labs, and fuel testing to classify crude oil and ensure product quality per ASTM standards.

What are the specifications of the API ASTM Plain Form hydrometer?

This API hydrometer has a 19/31° range with 0.1° scale divisions, ±0.1° accuracy, and a built-in 0 to 150ºF thermometer. It features ballast/glass construction and measures 13 inches overall height. The manufacturer part number is B61898-0000.

Where to buy an API hydrometer worldwide?

3G Electric supplies the API ASTM Plain Form hydrometer worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this precision instrument to your facility. Contact us for availability and lead time.

How to select the right API hydrometer for fuel testing?

Select an API hydrometer based on the expected gravity range of your petroleum product. This 19/31° model suits medium-density fuels. Ensure the thermometer range covers your test temperature, and verify ASTM compliance for accurate, repeatable results in quality control.

Used in

Common applications for API
Power plants — API control rods for flanged expansion joints in steam piping systems to manage thermal expansion.
Chemical processing — API control rods for single bulb expansion joints in corrosive fluid lines to prevent over-extension.
Oil and gas refineries — API control rods for double bulb expansion joints in high-pressure piping to control axial movement.
HVAC systems — API control rods for flanged expansion joints in large ductwork to accommodate temperature changes.
Water treatment — API control rods for expansion joints in pump discharge lines to restrict motion during pressure surges.
Industrial steam distribution — API control rods for single bulb expansion joints in 12-inch headers to ensure controlled expansion.
Not sure this is the right part? Photo-identify it

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from API

View all API parts
Glass hydrometer with API ASTM Combined Form scale, 29/41 range, and 0.1 scale divisions. Features a 0 to 150°F thermometer and overall height of 15 inches. Used for measuring specific gravity of petroleum products and crude oil in laboratory and refinery settings
API
Glass hydrometer with API ASTM Combined Form scale, 29/41 range, and 0.1 scale divisions. Features a 0 to 150°F thermometer and overall height of 15 inches. Used for measuring specific gravity of petroleum products and crude oil in laboratory and refinery settings

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first