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CR-3 CRYOGENIC HYGROMETER

Reference CR-3

Manufacturer: Buck Research Instruments

Condition: New

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

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Overview
SPECIFICATIONS

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