CR-3 CRYOGENIC HYGROMETER View larger

CR-3 CRYOGENIC HYGROMETER

CR-3

Buck Research Instruments

New

The CR-3 is specifically designed for long-term, continuous-use applications

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The new CR-3, like the CR-2, utilizes a closed cycle cryocooler, but differs in that it cannot be used on aircraft. The CR-3 is specifically designed for long-term, continuous-use applications where the instrument will mounted in a fixed location such as a laboratory.

Cryocooler lifetime is greatly extended for the CR-3. Typically, MTBF is over 100,000 hours for the cooler.

Options include a special sample chamber and mirror assembly for toxic and corrosive gases. Like all our instruments, the CR-3 is helium-leak checked. In addition to voltage, current and alarm outputs, the CR-3 has an RS-232 port.

CR-3 Hygrometer Specifications

Measurement Range
Dew / frost point temperature -120 to +30°C
Lowest Concentration ppbv
sea level <1
100 psig (7.8 bar) <.5
Reading Accuracy °C
Entire Range ±0.1°C
Concentration ±2%
Typical Response Time 10-20 seconds
Operating Range
Temperature -40 to +60°C
Pressure, psia (bar) 5 to 115 psia (0.3 to 7.8 bar)
Air / Gas flow range 0.2 to 3 liters/min
Cooling Mechanism Kleemenko Cycle Cryocooler
Power Requirements
Standard 115 vac, 60 Hz, <250 W
Optional 220-240 vac, 50-60Hz
Outputs 0-10V, 4-20mA, Alarm, RS-232

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