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ISO 17025 Humidity Calibration Services by Graftel

 For Over 10 years, Graftel's experience in the design, fabrication, application and calibration of humidity instrumentation have made us a humidity calibration resource for many industries. We have the capability to calibrate all types and sizes of humidity instrumentation. Our chambers can control and measure humidity, pressure and temperature simultaneously. Calibrations may be performed using air, nitrogen, helium, or custom non-explosive/nontoxic gases.

 Our two-temperature two-pressure generator allows for extreme accuracy RH, dew point and frost point measurements to be made down to -80°C. Our larger chambers allow for large devices to be calibrated against chilled mirror standards.

  All humidity calibrations are traceable to the National Institute of Standards and Technology. (NIST)  and are 17025 accredited. Graftel also works with JLC International to bring you quality temperature and humidity instrumentation. For more information about new products, see below.  If you have any further questions please feel free to call or email us.

 Graftel maintains two NIST traceable primary humidity calibration systems.  Each is built around a single pressure two temperature generator. These two systems cover overlapping ranges so that they may be checked against each other. In addition, each system contains a working secondary standard. For more information as to our systems, please read below.

Humidity Calibration Services Include
Sling Psychrometers
LiCl dew cells
RH sensors
Dial type gauges
Hygrometers
Chilled Mirrors

Gasses:
Air, Nitrogen, Helium, and custom non-explosive mixtures

Ranges:
Relative Humidity: 0.1 to 100%
Dew Temperature: -80 to 60 °C

Humidity Primary A

 This is a single pressure two temperature generator designed around the guidelines in “RSIP-5- Two- Pressure, Two Temperature Humidity Generator (3/02)”.   It is based upon the measurement of the temperature of a saturated air stream with a Hart Temperature standard using a platinum PRT.  A General Eastern Chilled Mirror is integrated into this system. It is used as a working secondary standard. The accuracy of the secondary standard is automatically verified while in use against the primary standard. The secondary standard is also periodically verified by calibration by outside independent laboratories.

 System humidity level is set, maintained and measured by the two temperature generator. The humidity chamber may be maintained at any constant temperature between 32 and 200 ^oF. Air is typically used, although any gas or mixture of gasses may be used instead.

• Either dew point or relative humidity may be measured. 

• Dew/Frost Point may be measured between 0 and 70 ^oF. The uncertainty in dew point measurement is 0.25 ^oF. 

• Relative humidity may be measured from 5% to 100% RH. The uncertainty in Relative Humidity measurement is 0.5%.

Humidity Primary B

 This is a single pressure two temperature generator designed around the guidelines in “RSIP-5- Two- Pressure, Two Temperature Humidity Generator (3/02)”.   It is based upon the measurement of the temperature of a saturated air stream with a Hart Temperature standard using a platinum PRT.  A liquid cooled General Eastern Chilled Mirror is integrated into this system. It is used as a working secondary standard. The accuracy of the secondary standard is automatically verified while in use against the primary standard. The secondary standard is also periodically verified by calibration by outside independent laboratories.

 System dew point is set, maintained and measured by the two temperature generator. Air is typically used, although any gas or mixture of gasses may be used instead .

 Only dew point may be measured. The uncertainty in dew point measurement is 0.25 ^oF.  Dew Point may be measured between -100 and 20 ^oF.

Do you need a Hygrometer, Dew Point Meter, or Moisture Meter?

Your global source for humidity sensors, humidity transmitters, humidity calibrators, hygrometers, dewpoint meters and dew point transmitters, PVDF and Teflon® liquid turbine low flow meters, Stainless Steel 316L turbine flow meters for liquid and gas, non-invasive ultrasonic flowmeters and switches, air velocity transmitters and switches, all Stainless Steel pressure and differential pressure transmitters, level transmitters and other instrumentation for the industry.

 JLC International is a U.S.A. based dynamic master distributor marketing specialty European instrumentation products for the control, measurement and test market- places. The company was founded in 1993 and is staffed with sales, marketing and engineering personnel in New Britain, Pennsylvania, USA. Inventory and service capabilities are also offered at this location.