Create the pressure you need —
when you need it
No matter the pressure medium or range — Ralston Instruments has a hand pump for that
Make Connections without a Tee
Connect to the pressure reference and to the device being calibrated without additional tees using the two pressure ports on Ralston hand pumps.
Reference Gauge Compatibility
Connect to standard digital or analog gauges using Ralston gauge adapters.
Hand held calibration for remote or hard to reach processes.
Creating the pressure you need — for any application
Vacuum-30 in Hg to 0
(-584 mmHg to 0)
Vacuum gauge calibration
Vacuum switch testing
Low Pressure0 to 100 psi
(0 to 7 bar)
Differential pressure transmitter calibration
Medium Pressure100 psi to 300 psi
(7 bar to 20 bar)
Relief valve testing
Pressure gauge calibration
Ralston Instruments Hand Pumps — Rugged Construction and Simple Convenience
Save time. Save money.
Fast and easy to operate, our pumps are engineered for the real world. It's simple to field test pressure transmitters, gauges or switches anywhere the job demands.
Replacement parts and kits for
all our hand pump models
Simple design allows easy field maintenance with just a screw driver
Soft seated bleed valves mean the pressure can be dropped very easily
built to work in the field
Lightweight, portable, handheld pressure up to 5,000 psi
Two pressure ports means
no need for a tee
Make precise adjustments of pressure with the fine adjust vernier
Each hand pump is compatible with all Quick-test™ hoses and adapters