Cryogenic Hygrometer for Long-term Continuous-use

Featured Product from Buck Research Instruments, LLC

Cryogenic Hygrometer for Long-term Continuous-use-Image

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.

Click here for the Operating Manual

Click here for the Data Sheet

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

Options include:

  • Special sample chamber and mirror assembly for toxic and corrosive gases
  • Helium-leak checked
  • RS-232 port, in addition to voltage, current and alarm outputs

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, 60Hz, <250W
  • Optional 220-240 vac, 50-60Hz
  • Outputs 0-10V, 4-20mA, Alarm, RS-232

Note: These are approximate specifications. Exact performance will vary depending on installation and operating environment. The right to make technical changes is reserved.

Watch our >>Webinar Now On-Demand:Humidity Measurement FAQ

Key Take-Aways:

  • Learn important humidity terms and the physics behind them.
  • Explore examples of the different technologies that can be used for measuring humidity.
  • Acquire a better understanding of proper sample system design and some of the main causes of measurement error when making humidity measurements.
  • Understand the importance of leak-checking and proper heat tracing for applications that require them.
  • Examples of chilled-mirror hygrometer solutions that BRI has provided to its customers

Buck Humidity Calculator for iPhone

The brainchild of Buck Research Instruments, Buck Humidity Calculator is a simple tool that allows you to do humidity calculations and conversions of dew point, mixing ratio, vapor pressure, relative and absolute humidity.

Click here to get the app from the iTunes store!

Buck Research Instruments

OUR MISSION To provide the most advanced, accurate and reliable humidity instrumentation available for industrial, laboratory, calibration standard, and airborne use, emphasizing high performance chilled mirror technology

OUR FOCUS Buck Research Instruments specializes in producing High Performance Chilled Mirror Hygrometers that offer fast and accurate measurements while maintaining exceptional reliability inherent only to chilled mirror operating principles.

COMPANY HISTORY Buck Research Instruments was founded in 1989 by Arden Buck, an internationally recognized authority on water vapor measurement, who is credited with major advances in the state of the art and has authored over 30 scientific papers. Buck Research Instruments has continued to develop new and advanced hygrometry instruments with state of the art performance.

FOR OVER TWO DECADES Buck Research Instruments has provided cryogenic hygrometers to NASA and others for use in a variety of high-altitude atmospheric research flights. Our products have been used in the stratosphere, as well as in demanding laboratory and industrial applications around the world.

High Performance Hygrometers for:

  • Industrial Use
  • Laboratory Use
  • Calibration Standard
  • Airborne Research

BRI specializes in producing high performance chilled mirror hygrometers that are exceptionally fast, accurate, and operate over a very wide humidity range.

We ensure temperature reading accuracy by using ultra-stable mirror temperature sensors that are calibrated against a NIST-traceable reference standard.