Model 65-120

Portable Pneumatic Calibrator

Series 65-120

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  • Provides high-degree accuracy for on-site testing and calibration service

Special Features

  • Versatile portable test stand combines precision measurement and durable construction in a compact unit that is capable of simulating, applying, holding, regulating and measuring both pressure and vacuum
  • The dial, all  pressure connections, and the controls are panel-mounted for easy access


0.066% of full scale

0.03% of full scale

0.01% of full scale

0.1% of full scale

0.02% of full scale

Temperature effect
Maximum is 0.1% of full scale per 10°C/18°F change from reference temperature 23°C/73.4°F

Scale length
45 in. (1140 mm) through 2 pointer revolutions

Dial diameter
8 ½ in. (215 mm)

Capsule system volume
6.9 cc with pointer at zero; 8.6 cc, at full scale

Case volume
3070 cc

Case pressure
35 psi (2.5 bar) maximum

Overpressure protection
A pressure relief valve protects the mechanism (capsule); pressure up to 90 psi will not damage the mechanism nor affect accuracy. A built-in relief valve and a flow restrictor rotect the case from pressures up to 10 times the case rating of 35 psi. This valve is an emergency-protective device only.

Maximum case leak rate
Will not exceed 1.03 x 10-7  std cc / sec or 0.018 psi / hr

Materials exposed to measured gas

  • Capsule system: Ni-Span C; soft solder; brass; 303 stainless steel; silver solder
  • Case system: Ni-Span C; brass; phosphor bronze, beryllium copper, magnesium, aluminum, nylon, 303 stainless steel; Elgiloy; soft solder, silver solder, Hypalon
  • Inlet manifold to pressure gauge: aluminum; brass; polyethylene; copper; steel; glass wool; carbon; Buna N

Gauge case
Anodized aluminum with tempered-glass dial cover

Carrying case
ABS plastic 17 ½ in. x 12 in. x 7 ½ in. (445 x 305 x 190 mm)

6 adapters for ⅛” pipe thread to ¼” plastic tubing, 20 ft of ¼”
OD plastic tubing, instruction book, sheet with summary of important instructions

Shipping weight
approx. 26 lb (12 kg); approx. 20 lb (9 kg) net

Calibrator for use with non-corrosive gases.  It should not be used with liquids.

Portable Pneumatic Calibrator Series 65-120

Portable Pneumatic Calibrator Series 65-120

  • Portable Pneumatic Calibrator Series 65-120
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