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).

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Fisherbrand™ Traceable™ Precision Monitoring Thermohygrometer

This digital temperature and humidity meter continuously monitors and displays readings graphically and numerically.

Pricing and Availability

Fisherbrand™ Dual LCD Display Thermo-Hygrometer

Pricing and Availability

TFA Dostmann™ Digital Indoor Thermo-Hygrometer

An excellent choice for the monitoring of indoor temperature and humidity.

Pricing and Availability

Fisherbrand™ Traceable™ Thermometer/Clock/Humidity Monitor

Measures ambient temperature, relative humidity and tells time.

Pricing and Availability

TFA Dostmann Digital Thermo-Hygrometer

This modern ultra-flat glossy digital thermo-hygrometer is an ideal instrument for monitoring the indoor climate. You can easily keep an eye on temperature and humidity. If a smiley icon appears, the values are ideal. The highest and lowest values are stored and displayed at the push of a button.

Pricing and Availability

Fisherbrand™ Traceable™ Relative Humidity/Temperature Meters

Monitor air conditions in environmental chambers, chemical storage areas, cleanrooms, incubators and stockrooms

Pricing and Availability
Specifications

Temperature Accuracy	±1°C (0 to 40°C) otherwise ±2°C
Width (English)	2.62 in.
Length (Metric)	1.57 cm
Memory	Stores and recalls minimum/ maximum temperature and humidity readings, display up-dated every second
Length (English)	0.62 in.
Material	ABS Plastic
Humidity Range	25 to 95%
For Use With (Application)	Monitor air conditions in environmental chambers, chemical storage areas, cleanrooms, incubators and stockrooms
Width (Metric)	7 cm
Includes	Bench stand, switch to +read °F/°C, fast-response solid-state sensors and two AAA batteries
Accuracy	±3%RH (25 to 75)%RH, ±5%RH otherwise
Display Type	LCD
Temperature Range (English)	32°F to 122°F
Weight (English)	2.5 oz.
Certifications/Compliance	ISO 17025, A2LA, NIST
Sensors	Solid State
Temperature Range (Metric)	0°C to 50°C
Temperature Resolution	1°F
Resolution	0.01

Fisherbrand™ Traceable™ Thermohygrometer with Clock

Monitor temperature, humidity, and time simultaneously, at a glance.

Pricing and Availability

Fisherbrand™ Traceable™ Precision Lollipop™ Water-Resistant Thermometers

This digital and water-resistant thermometer provides results in two seconds

Pricing and Availability
Specifications

Includes	Protective Sheath, Suction-Cup Mount, Hook and Loop Mount, Magnetic Mount, CR2032 Battery, and NIST-Traceable Certificate (with data)
Accuracy	±0.5°C from -20°C to 200°C, ±1°C otherwise
Type	Lollipop Thermometer
Width (English)	1 in.
Display Type	LCD
Temperature Range (English)	-58°F to +482°F
Weight (English)	2 lb.
Certifications/Compliance	NIST
For Use With (Application)	Temperature Monitoring
Width (Metric)	2.54 cm
Weight (Metric)	0.907 kg

Fisherbrand™ Digital Hygrometer with Thermometer

Use this hydrometer for reliable service even in harshest environments. Digital Hygrometer with Thermometer simultaneously displays both temperature and relative humidity.

Pricing and Availability

Fisherbrand™ Traceable™ Alarm RH/Temperature Monitor

Monitors round-the-clock for critical experimental requirements.

Pricing and Availability
Specifications

Height (Metric)	1.9 cm
Temperature Accuracy	±0.5°C
Width (English)	4.25 in.
Length (Metric)	7 cm
Length (English)	2.75 in.
Material	ABS Plastic
Humidity Range	5 to 95%
For Use With (Application)	For routine measurements, round-the-clock monitoring, quality control and critical experiments, place sensor in hoods, cleanrooms, coolers, stockrooms, incubators, environmental chambers and chemical storage areas
Width (Metric)	10.8 cm
Alarm Types	Audible
Accuracy	Humidity Accuracy: ±3% midrange, ±5% otherwise
Type	Remote Alarm Rh/Temperature Monitor
Dimensions (L x W x H)	2.75 x 4.25 x 0.75 in. (7 x 10.8 x 1.9 cm)
Display Type	LCD w/ 0.5 in. digits
Temperature Range (English)	32°F to 140°F
Weight (English)	4 oz.
Certifications/Compliance	ISO 17025, A2LA, NIST
Temperature Range (Metric)	0°C to 60°C
Weight (Metric)	0.113 kg
Height (English)	0.75 in.
Temperature Resolution	0.1°F