Duro United Instruments offers superior, rugged pressure gauges to fit any application.

Standard Duro gauge dials range from 1.5” to 8.5”. Accuracy up to 0.5% and ranges of vacuum, compound and pressure up to 20,000 PSI. Constructed with full-sized bourdon tubes (C-shaped and spiral) and mounted to precision German rack and pinion movements, Theumling’s Duro line provides the right gauge for your application.

Download the SPAN Catalog
See Our Duro Options:

To learn more, or to purchase any of these products, email us at thuemling@earthlink.net or call, 1-800-686-1789.

All Duro United Gauges

Accugauge AG100, Digital Pressure Gauge
Operate with any liquid or gas that is compatible with 17-4PH stainless steel.
Download Product Specifications

Altitude – Series 13
Indicates the height of water in tanks, stand pipes, reservoirs, or hot water heating systems.
Download Product Specifications

Ammonia Gauge – Series 15
Designed for use on installations on ammonia tanks or anywhere ammonia is used.
Download Product Specifications

Brass Liquid Filled Gauges – Series 2
Glycerin filled for added durability where vibration is present.
Download Product Specifications

OEM Economy Gauges – Series 1
For use with gas, oil and water or any medium not corrosive to brass or bronze.
Download Product Specifications

Refrigeration Gauge – Series 14
For use by refrigeration engineers requiring high quality gauges that are non-corrosive to bronze.
Download Product Specifications

General Service Gauges – Series 10
Designed for use with air, gas and water or any medium not corrosive to brass or bronze.
Download Product Specifications

Industrial Process Gauges – Series 20
For rugged applications where accuracy and dependability is required.
Download Product Specifications

Solid Front Safety Process Gauges – Series 70 and 80
Offers the operator maximum protection in the event of a bourdon tube failure
Download Product Specifications

Stainless Liquid Filled Gauges – Series 3
Heavy duty, all stainless steel gauge.
Download Product Specifications

Test Gauges – Series 2554
Only one moving part and an inconel direct drive spiral bourdon tube.
Download Product Specifications

Water Level Gauge – Model CA566
Used to indicate level of water in a well.
Download Product Specifications