ADT 901

Additel ADT 901 pressure calibrator
  • Additel ADT 901 pressure calibrator
Pneumatic pumps

ADT 901

-400 mBar a 400 mBar

Low Pressure Test

  • Pump Portable, only 3.5 lb
  • Great stability and high resolution
  • Dual pressure modules
  • Minimal maintenance
  • Hand-tight quick connectors

Technical specifications

0.1 Pa (0.001 mbar)
Height: 5.7'' (145mm) Base: 9.65'' (245 mm) x 6.50'' (165mm) - 3.5 lb (1.6 kg)
1 year
Ram/adapters: SS; Body: SS/aluminum; Seals: Buna-N


The 901B 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 is designed for fine pressure adjustment, with an adjustment resolution up to 0.1 Pa (0.001 mbar). The 901B is a very stable low pressure calibrator. It 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) and are not well insulated which will cause large fluctuations in pressure with a change in ambient temperature or when the unit is touched. The 901B 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 901B is an ideal comparison test pump for low pressure applications.