Hygrometers
Instruments that measure moisture in ambient air; types include indicator papers and dial-styles; electronic versions may be analog or digital; may be traceable to NIST. Because humidity is affected by temperature, most hygrometers include thermometers to correct readings.
Hygrometers, or humidity meters, are devices for measuring the level of water vapor (also known as relative humidity, RH) in the atmosphere or in other gases.
How Are Hygrometers Used?
• Monitoring moisture levels in laboratory incubators, growth chambers, greenhouses, and controlled climate cabinets
• Measuring humidity in confined spaces, rooms, or buildings where moisture levels are critical to the activity being performed or to the objects or materials being stored
• Measuring humidity in domestic or residential settings
• Meteorological and climate monitoring
Classical, mechanical hygrometers, which are less widely used today, include wet/dry bulb hygrometers or psychrometers and hair tension hygrometers, which rely upon a single (hygroscopic) hair or fiber.
Most hygrometers available on the market today are electronic digital instruments, which measure humidity using capacitive or resistive sensors. These digital devices offer clear displays with reliable and consistent performance, and are typically compact, hand-held, or benchtop units with a minimal footprint. They may also be available with temperature, timer and alarm functionality, and with externally corded probes and wireless radio-signal connectivity for remote monitoring and data logging. Many operate over a wide temperature range of -5° to +50°C, with a typical measurement range of 0 to 95% relative humidity (RH).
Cole-Parmer Traceable Thermometer with Clock, Humidity Monitor, and Calibration
Unique unit simultaneously displays time-of-day, temperature, and humidity. Clock displays AM/PM or 24-hour military time to the exact minute with 0.01% accuracy. Noting changes is easy with triple display. Internal sensors make it ideal for use in hoods, storerooms, clean rooms, incubators, drying chambers, and environmental cabinets. Temperature range is 32.0 to 122.0F and 0.0 to 50.0C. Resolution is 0.1 and accuracy is 1C. Relative humidity range is 20 to 90%. Resolution is 1% RH and accuracy is 5% RH mid-range, otherwise 8%. At the touch of a button, memory recalls highest and lowest temperature and humidity readings.
Research Products International Corp Temperature and Humidity Monitor, Supplied with Battery, 4 1/4 x 3 3/4 x 7/8 Inches
View both temperature and humidity readings even from across a room with this extra large display. Convenient for use in labs, storage areas, incubators, refrigerators or fume hoods. Features automatic recall of min/max readings and manual recall.
Supplied with AAA battery that will last up to one year.
Cole-Parmer Traceable Digital Thermohygrometer with Dew Point, Wet-Bulb, and Calibration
This thermohygrometer monitors temperature, humidity, dew-point, and wet-bulb. Displays current conditions along with minimum, and maximum readings. Settable high/low alarm for all four readings (dew-point, wet-bulb, humidity, temperature) may be set in 0.1 increments, and will sound for one minute and red LED will flash until readings return to non-alarm condition. Traceable Products have an individually-numbered Traceable Certificate provided with each unit, that assures accuracy from our ISO/IEC 17025:2017(1750.01) calibration laboratory accredited by A2LA. It indicates traceability of measurements to the SI units through NIST or other recognized national measurement institutes (NMI) that are signatories to the CIPM Mutual Recognition Agreement. Each product goes through an intense vetting process before it can carry the Traceable name, thus saving you both time and money by not having to calibrate separately.
Cole-Parmer Extech 445703 Big Digit Thermohygrometer
Designed to monitor relative humidity, and temperature. Features include a super large display, C/F switchable, Min/Max with reset function, low battery indication and a built-in stand for sitting on a desk and hardware for mounting on a wall.
Cole-Parmer General Tools A600FC Thermo-Hygrometer, 30/250F 0/100%RH/
- Aluminum case
- Flange mounting
- Measures temperature and humidity
- Fahrenheit scale
Cole-Parmer Extech 445715 Big Digit Thermohygrometer with Remote Probe
Designed to monitor relative humidity, and temperature. Features include a super large display, C/F switchable, Min/Max with reset function, low battery indication and a built-in stand for sitting on a desk and hardware for mounting on a wall.
Cole-Parmer Traceable Precision Monitoring Thermohygrometer with Calibration
Simultaneously display Min/Max and current temperature and humidity with 7-day graph. Includes NIST-Traceable certificate from our A2LA accredited (1750.01) calibration laboratory. Scroll through temperature and humidity data for the past seven days. Maintain data integrity-historical data cannot be cleared, only overwritten. Easily switch between F/C and 12/24-hour time formats.
Thomas Scientific Traceable Hygrometer / Thermometer
Meter may be used with bench stand and can also be wall mounted. Unit measures 3 1/2” x 5” x 7/8” and weighs six ounces. Devices are provided with an individually serial numbered Traceable certificate from an ISO 17025 calibration laboratory accredited by A2LA. Certificate indicates traceability to standards provided by NIST.
Thermco Products Inc Thermco ACC8540PC Specific Gravity Plain Form Polycarbonate Hydrometers, 1.000 to 1.220 Range, 0.002 Division, 300mm Length
Thermco’s Plastic Hydrometers are fabricated from polycarbonate (PC) which makes the instrument shatter-proof, while offering glass-like clarity for ease of reading. All models are plain form, so a separate hermometer should be used to measure the temperature of the sample and correct for any temperature variations. Fabricated from PolycarbonateShatter Proof-Glass-Like Clarity-Calibrated against NIST Standards-May be Certified - Traceable to NIST
VAISALA INC HH Humidity/Temperature Meter w/Remote Short Probe & Handle
The HM40 is an ideal everyday spot-checking tool for HVAC professionals. The proven Vaisala HUMICAP 180R sensor provides reliable measurement while the user interface with graphical trend display makes daily operation quick and easy.
Cole-Parmer Oakton 7542-00 Thermohygrometer with Digital Thermometer
Easily mount this thermohygrometer in your office, laboratory, greenhouse, or food storage environments. This thermohygrometer remains accurate and stable without maintenance or adjustments. Case is constructed of corrosion-resistant ABS plastic. What's included: battery, mounting bracket, and screws.