Starting at $1,116.00

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  • 6 psi (0.4 bar) vacuum to 6 psi (0.4 bar) positive pressure
  • 0.01 Pa (0.0001 mbar) pressure resolution
  • Isothermal chamber reduces influence of environmental temperature change
  • Specially designed bellows minimize leakage
  • 1 year warranty

The Additel ADT 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 is designed for fine pressure adjustment, with an adjustment resolution up to 0.01 Pa (0.0001 mbar). To reach the pressure as stable as possible during micro-pressure calibrations, an isothermal bellows chamber is designed for reducing the possible heat effects caused by environmental temperature change. Without non-returning valve that is usually used on troublesome hand pumps, the ADT 901A requires minimal maintenance. 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 ADT 901A is an ideal comparison test pump for low pressure applications.

Additel ADT901-Kit Test Kit
Test kit for ADT 901; hose barb fitting, hose, etc
Additel ADT 103 Adapter Fittings
10 piece adapter & fittings set for all Additel pumps (except ADT949)
Additel 9901-901 Carrying Case
Carrying case for the ADT 901 pump & two ADT 681 gauges or ADT 672 calibrators
Additel ADT100-HTK Hose Test Kit
5 feet of flexible hose, 8,000 or 15,000 psi range & choice of connectors
In Stock
Additel ADT 102 Adapter Fittings
25 piece adapter & fittings kit for all Additel pumps (except ADT 949)
Additel 100 Series Filters
Designed for ease of use & low maintenance with pneumatic ranges up to 600 psi & hydraulic ranges up to 10k psi

Application Notes

Here's how some of our customers used this product.

Generating Very Low Pressures For Calibrations

The Background: Our customer, a pharmaceuticals company, needs a solution for calibrating very low pressure transmitters used for room pressure monitoring.

The Problem: The main hurdle is finding a solution capable of generating such small pressures, in the range of just 1/2 inch of water column, that doesn't cost a small fortune.

The Solution: We recommended the Additel ADT901 low pressure test pump which is designed to generate pressures from -6 to 6 psi, the Additel ADT 672 digital pressure calibrators a test gauge capable of measuring these very low pressures as well as providing a power source for the transmitters. The Additel ADT-901-KIT test kit provides all the connections necessary. This provides a highly accurate solution for calibrating low pressure transmitters.