901A Low Pressure Calibration Test Pump

Air: -6psi to 6psi

The Additel 901A Low Pressure Test Pump is a hand operated pressure pump designed to generate pressures from -6 psi (-0.4 bar) to 6 psi (0.4 bar). A high-quality screw press has been designed for fine pressure adjustment, with an adjustment resolution up to 0.1 Pa (0.001 mbar). The 901A is a very stable low pressure calibrator that makes use of an isothermal bellows chamber which is designed for reducing the possible effects of environmental temperature change.

Most pumps make use of a check valve (non-returning valve) that are not well insulated which will cause large fluctuations in pressure with a change in ambient temperature or when the unit is touched. The 901A does not use a check valve and is remarkably stable.

Two hand-tight connectors installed on the pump allow easy connecting and disconnecting to the test pump without the need for PTFE tape or wrenches. 

The Additel ADT901A pump is an ideal comparison test pump for low pressure applications, featuring:

• Great stability and high resolution
• Minimal maintenance
• Hand-tight quick connectors
• Lightweight and portable (only 1.6kg)
• Easy to use
• 1 year warranty 

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Portable
Only 1.6kg

Adjustment Resolution
0.1Pa (0.001 mbar); specially designed screw press for fine pressure adjustment

Great Stability
Isothermal chamber: the pressure chamber is insulated to reduce the influence from environmental temperature changes. Specially designed bellows minimisse leakage to guarantee excellent stability.

Durable and Minimal Maintenance
Without non-returning valve that is usually used on troublesome hand pump.

Easy-to-use
Pressure could be set and adjusted precisely and quickly through a simple turn of the handle.

Hand-tight Quick Connectors
Allows easy connecting and disconnecting to the test pump without the need for PTFE tape or wrenches.  

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Air

Generated Pressure Range
6 psi (0.4 bar) vacuum to 6 psi (0.4 bar) positive pressure.

Adjustment Resolution
0.1 Pa (0.001 mbar)

Seals: Buna-N

Connection 
Hand-tight connectors for both test gauge and reference gauge
Test Gauge Connection: 1/4NPT female, 1/4BSP female, or M20X1.5 female
Reference Gauge Connection: 1/4NPT female, 1/4BSP female, or M20X1.5 female

Dimensions
Height: 5.7'' (145mm) 
Base: 9.65'' (245 mm) x 6.50'' (165mm)

Weight: 
3.5 lb (1.6 kg)

Ordering Info

Accessories Included

Optional Accessories

Video Demo of the ADT901A