Digital Thermometer Hygrometers

Determine relative humidity within ±4% accuracy and temperature within ±1.8° F accuracy. This meter comes with a calibration certificate traceable to NIST that states it has passed a test for accuracy. It also displays dew point or frost point.

	RH		Temp.				Probe
	Range	Accuracy	Indoor Range	Accuracy	Dew Point Range	Cable Lg.	Lg.	Dia.	Ht.	Wd.	Dp.	Battery Size (No. Req.)	Batteries Included		Each
With LCD Display



		10% to 99%	±4%	14° F to 140° F/-10° C to 60° C	±1.8° F	14° F to 140° F/-10° C to 60° C	18"	1 11/16"	9/16"	4 1/4"	3 7/8"	3/4"	AAA (2)	Yes	0000000	0000000

Temperature and Humidity Meters


10% to 95% Relative Humidity Range	25% to 95% Relative Humidity Range

RH		Temp.
Range	Accuracy	Indoor Range	Accuracy	Ht.	Wd.	Dp.	Digit Ht.	Display Type	Housing Material	Temp. Features	Includes	Battery Size (No. Req.)	Batteries Included	Mounting Hole Dia. (No. of)	Fasteners Included		Each
10% to 95%	±5%	-40° F to 158° F/-40° C to 70° C	±2° F/±1° C	2 15/16"	4 3/4"	13/16"	1/2"	LCD	Plastic	—	Pull-Out Stand	AAA (2)	No	1/4" (2)	No	00000000	000000
25% to 95%	±5%	32° F to 122° F/0° C to 50° C	±2° F/±1° C	3 3/4"	2 5/8"	5/8"	5/8"	LCD	Plastic	Min./Max. Memory	Pull-Out Stand	AAA (2)	Yes	3/32" (2)	No	00000000	000000

Remote-Reading Temperature and Humidity Meters

Meters measure indoor relative humidity and indoor and outdoor temperatures.

LCD Display—Meter with LCD display also measures outdoor relative humidity.

	RH			Temp.
	Indoor Range	Outdoor Range	Accuracy	Indoor Range	Outdoor Range	Accuracy	Ht.	Wd.	Dp.	Battery Size (No. Req.)	Batteries Included		Each
With LCD Display and Wireless Sensor



		20% to 95%	20% to 95%	±5%	32° F to 122° F/0° C to 50° C	-40° F to 140° F/-40° C to 60° C	±2° F/±1° C	3 3/8"	5 1/16"	1 1/2"	AA (2), AAA (2)	No	00000000	000000

Through-Wall-Mount Temperature and Humidity Meters

Monitor relative humidity, temperature, and dew point inside sealed containers. These meters are rated IP67, so they won't expose contents to dust and water. The housing is aluminum, which is lightweight and resists corrosion.

RH		Temp.		Dew Point
Range	Accuracy	Indoor Range, ° C	Accuracy	Range, ° C	Accuracy	Dp.	Dia.	For Hole Dia.	For Max. Wall Thk.	Batteries Included	Fasteners Included	Enclosure Rating		Each
5% to 80%	±3%	-20 to 60	±0.5° C	-30 to 20	±2° C	1 1/4"	2 1/2"	1 27/64"	11/32"	Yes	Yes	IP67	0000000	0000000

Pocket Temperature and Humidity Meters with Calibration Certificate

To ensure reliable readings on the go, this portable meter comes with a calibration certificate traceable to NIST that states it has passed a test for accuracy.

RH		Temp.
Range	Accuracy	Range	Accuracy	Ht.	Wd.	Dp.	Digit Ht.	Display Type	Housing Material	Temp. Features	Includes	Battery Size (No. Req.)	Batteries Included		Each
20% to 95%	±3.5%	32° F to 122° F/0° C to 50° C	±1.8° F/±1° C	5"	7/8"	5/8"	3/4"	LCD	Plastic	Min./Max. Memory	Belt Clip	CR2032 (1)	Yes	00000000	0000000

Remote-Reading Handheld Temperature and Humidity Meters

The probe is attached to a 3-ft. cable for checking humidity, temperature, and dew point in hard-to-reach areas.

	RH		Temp.				Probe
	Range	Accuracy	Range	Accuracy	Dew Point Range	Cable Lg., ft.	Lg.	Dia.	Connection	Ht.	Wd.	Dp.	Battery Size (No. Req.)	Batteries Included		Each
With LCD Display



		5% to 95%	±3%	32° F to 120° F/0° C to 50° C	±1.5° F/±0.8° C	-13° F to 120° F/-25° C to 48° C	3	8"	5/8"	4-Pin Circular DIN	7"	2 11/16"	1 3/4"	AA (6)	No	00000000	0000000

Quick-Export Temperature and Relative Humidity Data Recorders

No cords or software required—these data recorders store readings on an included SD card in Excel format for easy transfer to a PC.

Data Recorders with Calibration Certificate Traceable to NIST—Data recorders with a NIST certificate of calibration include a calibration certificate traceable to NIST that states the recorder has passed a test for accuracy.

					RH		Recording Interval, sec.
	Digital Display Type	Digit Ht.	Temp. Range	Temp. Accuracy	Range	Accuracy	Min.	Max.	Ht.	Wd.	Dp.	Batteries Included		Each
Data Recorders



		LCD	1/2"	32° F to 122° F/0° C to 50° C	±1.5° F/±0.8° C	10% to 90%	±4%	5	600	5 3/16"	3 1/16"	1 5/16"	Yes	000000	0000000


		Data Recorders with Calibration Certificate Traceable to NIST



				LCD	1/2"	32° F to 122° F/0° C to 50° C	±1.5° F/±0.8° C	10% to 90%	±4%	5	600	5 3/16"	3 1/16"	1 5/16"	Yes	000000	000000

Desktop Multifunction Barometers


Style A	Style B

Style C

Check temperature, relative humidity, atmospheric pressure, and time with a single barometer.

Remote-Reading Barometer—Remote-reading barometers wirelessly monitor outdoor temperatures and relative humidity as well as indoor conditions. They'll transmit readings from up to 200 feet away.

525,600 Readings—Direct-reading barometers that hold 525,600 readings store about two years’ worth of data. They’re often used in laboratories because they continuously monitor conditions, so you can track changes over time. Use their USB-A connection to transfer stored data to your PC with a USB cord (not included).

			Barometric Pressure		Altitude Measuring Range, ft.
	Style	Max. Transmission Distance, ft.	Range	Accuracy	Min.	Max.	Weather Features	No. of Readings	Ht.	Wd.	Dp.	Data Connection	Battery Size (No. Req.)	Batteries Included	Mounting Hole Dia. (No. of)	Fasteners Included		Each
Remote-Reading Barometers with LCD Display



		A	200	31.15 in. Hg to 32 in. Hg	±0.15 in. Hg	—	—	Audible Alarm, Clock, Trend Indicator	—	4 1/4"	6 1/4"	1 1/4"	—	AA (4), AA (2)	No	5/16" (1)	No	0000000	000000


		Direct-Reading Barometers with LCD Display and Calibration Certificate Traceable to NIST



				B	—	14.5 in. Hg to 30 in. Hg	±0.12 in. Hg	—	—	Audible Alarm, Clock, Trend Indicator	—	4"	3"	1"	—	AA (3)	Yes	3/8" (1)	No	0000000	000000


				C	—	500 mbar to 1,030 mbar	±4 mbar	-320	8,200	Audible Alarm, Clock, Trend Indicator	525,600	5 1/2"	3 1/4"	1"	USB-A	AAA (3)	Yes	3/8" (1)	No	0000000	000000

Handheld Temperature and Humidity Meters


10% to 90% Relative Humidity Range	0% to 99.9% Relative Humidity Range

For comprehensive system checks and quality control, these meters measure a wider relative humidity range than pocket meters.

RH		Temp.
Range	Accuracy	Range	Accuracy	Ht.	Wd.	Dp.	Digit Ht.	Display Type	Housing Material	Probe Type	Temp. Features	Includes	Battery Size (No. Req.)	Batteries Included		Each
10% to 90%	±3%	-4° F to 122° F/-20° C to 50° C	±1.8° F/±1° C	6 11/16"	1 7/8"	1/2"	3/16", 3/8"	LCD	Plastic	—	Data Hold Function, Min./Max. Memory	Pocket Clip	AAA (2)	Yes	0000000	0000000
0% to 99.9%	±3%	14° F to 122° F/-10° C to 50° C	±1.8° F/±1° C	7 1/2"	2 1/2"	1 1/2"	3/4"	LCD	Plastic	Built-In	Data Hold Function, Min./Max. Display	—	9V (1)	Yes	00000000	00000

Remote-Reading Temperature, Relative Humidity, and Dew Point Paper-Chart Data Recorders with Audio/Visual Alarm

Image of Product. Front orientation. Data Recorders. Remote-Reading Temperature, Relative Humidity, and Dew Point Paper-Chart Data Recorders with Audio/Visual Alarm.

Remotely record temperature, humidity, and dew point up to 10 feet from the display and set the alarm to sound and flash the display if temperature readings rise above or fall below a set range. This recorder has a remote probe on a 10-ft. cable and a display that can be set to show current temperature, minimum/maximum temperature, or relative humidity and calculated dew point.

			RH		Dew Point
For Chart Dia.	For Recording Time	Temp. Accuracy	Range	Accuracy	Range	Accuracy	Voltage, V AC	Ht.	Wd.	Dp.	Batteries Included	Fasteners Included		Each
8"	24 hr., 7 day	±1.8° F/±1° C	0% to 95%	±2%	32° F to 120° F/0° C to 50° C	±3.6° F/±2° C	120	10 1/8"	9 3/8"	2 3/4"	Yes	No	00000000	0000000

Accessories and Replacements for Data Recorders

Data Recorder Charts

Data Recorder charts (not included) are required; select a recording time and temperature range from the available chart options.

	Temp. Range	Choose a Recording Time	Pkg. Qty.		Pkg.
Fahrenheit Scale



	8"	-20° F to 120° F	24 hr. , 7 day	60	00000000	000000


	8"	40° F to 110° F	24 hr. , 7 day	60	00000000	00000


	Celsius Scale



			8"	-20° C to 50° C	24 hr. , 7 day	60	00000000	00000

Pen Color		Each
Blue	00000000	000000

Electrical Resistance Meters

Check that floors, garments, and other work surfaces won’t discharge static electricity. These laboratory-grade meters are made in the U.S. and certified to NIST standards for accuracy and reliability. They’re essential in server rooms, clean rooms, and other environments where static could harm sensitive electronics. Also known as surface resistance meters, they’re fully compliant with ANSI for testing and validating workplace static control systems.

To prevent static discharge, surface resistance needs to be less than 1×10⁹ ohms. Our meters measure resistance as high as 1×10¹² ohms, with the results clearly displayed on a crisp OLED screen. Readings are exact to two places, with no rounding to the nearest exponent like with less sophisticated meters.

Each meter comes with leads and two 5 lb. probes. Place one probe on a surface to measure the resistance to the ground (Rtg), or place both on a surface to measure the point-to-point resistance between them (Rtt).

				Batteries
Resistance, ohm	Accuracy	Features	Includes	Included	Size	No. Required		Each
1× 10^3 to 1× 10^12	±10%	Battery Life Indicator, Data Memory	1 Alligator Clip, 1 Carrying Case, 1 Ground Plug Adapter, 2 Probe Spacers (10" Lg. and 36" Lg.), 2 Test Leads, 2 Test Probes	Yes	AA	4	000000	000000000

Accessories and Replacements for Electrical Resistance Meters

Small Parts Probe—Use the small parts probe (sold separately) to measure resistance on small items or in hard-to-access areas, such as server racks or semiconductor assembly lines.

Packaging Probe—Use the packaging probe (sold separately) to measure the resistance of thin packaging and films.


Small Parts Probe	000000	Each	0000000
Packaging Probe	000000	Each	000000
AA Batteries	00000000	Pkg. of 4	0000

Handheld Weather Meters

Take field measurements of temperature, dew point, heat index, wind chill, wind speed, and relative humidity.

Wind Speed Range, mph	Display Type	Digit Ht.	Resolution	Ht.	Wd.	Dp.	Housing Material	Includes	Batteries Included		Each
1.3 to 90	LCD	3/8"	0.1	4 7/8"	1 7/8"	1 1/8"	Plastic	Carrying Case, Lanyard	Yes	000000	0000000

Environmental-Monitoring Modules for Development Boards

Keep equipment running and working conditions safe—these modules add air quality tracker capabilities to your development board. Each module gathers data on air conditions, ranging from temperature and humidity to carbon dioxide or volatile organic compound (VOC) levels. These modules easily connect to boards and other components with Qwiic cords or by soldering.

Modules with Temperature, Humidity, and Air Quality Sensor

Modules with a temperature, humidity, and air quality sensor help you make sure the air is healthy in your facility. They directly measure the amount of carbon dioxide in the air.

	Output Data
	Resolution, bit	Freq., Hz	Measures	Temp. Range, ° C	RH	Carbon Dioxide Concentration Measured, ppm	Input Voltage, V DC	I2C Address	Connection Method	No. of Qwiic Connections	Lg.	Wd.		Each
I²C Communication Protocol—Qwiic Connection



		16	0.2	Temperature, Relative Humidity, Carbon Dioxide Level	-10 to 60	0% to 100%	0 to 40,000	2.4 to 5.5	0x62	Solder	2	1"	1"	0000000	000000

Modules with Temperature, Humidity, and Barometer Sensor

Modules with a temperature, humidity, and barometer sensor are often used as part of an automated system that runs equipment based on the weather. For instance, you can use them in a system that will turn on a humidifier if humidity dips below a certain level.

	Temp. Range, ° C	RH	Barometric Pressure, in. Hg	Input Voltage, V DC	I2C Address	Connection Method	No. of Qwiic Connections	Lg.	Wd.		Each
I²C Communication Protocol—Qwiic Connection



	Temperature, Relative Humidity, Barometric Pressure	-40 to 85	0% to 100%	8.9 to 32.5	1.71 to 3.6	0x76 0x77	Solder	2	1"	1"	0000000	000000

Modules with Temperature, Humidity, Air Quality, and Barometer Sensor

Modules with a temperature, humidity, air quality, and barometer sensor give you the most comprehensive picture of air conditions in your facility. They directly measure the amount of VOCs and give you an estimated measurement of carbon dioxide based on VOC levels. They monitor air quality using Germany’s Air Quality Index (AQI).

	Temp. Range, ° C	RH	Equiv. Carbon Dioxide Concentration Measured, ppm	Total Volatile Organic Compound, ppb	Barometric Pressure, in. Hg	Input Voltage, V DC	I2C Address	Connection Method	No. of Qwiic Connections	Lg.	Wd.		Each
I²C Communication Protocol—Qwiic Connection



	Temperature, Relative Humidity, Equivalent Carbon Dioxide, Total Volatile Organic Compound Concentration, Air Quality Index, Barometric Pressure	0 to 65	20% to 80%	400 to 650,000	0 to 65,000	8.9 to 32.5	1.2 to 3.6	0x52 0x53 0x76 0x77	Solder	2	1"	1"	0000000	000000

Wireless Weather Stations

Monitor nine different weather conditions up to 1,000 feet away. The outdoor weather sensor measures outdoor temperature, humidity, wind speed and direction, rainfall rate, total rainfall, barometric pressure, heat index, wind chill, and dew point. It wirelessly transmits readings to the console by radio signal. Console has built-in sensors to measure indoor temperature and humidity. Console can be placed on a desk or mounted to a wall.

Cannot Be Sold To—They cannot be sold to the listed areas due to product registration requirements.

	Wind Speed		Wind Direction								Electrical
Max. Transmission Distance, ft.	Range, mph	Accuracy	Range	Accuracy	Mounting Location	Console Housing Material	Sensor Housing Material	Sensor Power	Voltage Range, V AC	Cord Lg., ft.	No. of Blades	Connection	Weather Features	Batteries Included	Cannot Be Sold To		Each
1,000	0 to 200	±5%	1° to 360°	±3°	Pipe, Wall	Plastic	Plastic	Solar	100 to 240	10	2	Straight Blade	Battery Backup	Yes	Outside United States, Canada, and Mexico	0000000	0000000

Compact Multifunction Barometers


Style A	Style B

Check temperature, atmospheric pressure, and altitude wherever you go with these palm-sized barometers.

Data-Recording Software—Barometers with data-recording software save the measurements they display. Connect them to your PC with their USB-A plug to program alarms, set intervals for data collection, and visualize your data with multiple different views. For easy analysis, you can also export your data to Excel. Download a free app to control these barometers with your Android device.

		Barometric Pressure		Altitude Measuring Range, ft.
	Style	Range, in. Hg	Accuracy	Min.	Max.	Features	Includes	Ht.	Wd.	Dp.	Operating System Compatibility	Data Connection	Battery Size (No. Req.)	Batteries Included		Each
Direct-Reading Barometers with LCD Display



		A	0.88 to 482.23	±0.06 in. Hg	—	30,000	Audible Alarm, Clock, LED Indicator	Data-Recording Software	1 1/4"	3 3/4"	3/4"	Android 4.0 or Later, Windows 7 or Later	USB-A	CR2032 (1)	Yes	00000000	0000000


		Direct-Reading Barometers with LCD Display and Calibration Certificate Traceable to NIST



				A	0.88 to 482.23	±0.06 in. Hg	—	30,000	Audible Alarm, Clock, LED Indicator	Data-Recording Software	1 1/4"	3 3/4"	3/4"	Android 4.0 or Later, Windows 7 or Later	USB-A	CR2032 (1)	Yes	00000000	000000


				B	8.85 to 32.45	±0.24 in. Hg	-2,250	29,500	Clock, Compass, Stopwatch	—	3 3/4"	2 3/4"	3/4"	—	—	CR2032 (2)	Yes	00000000	000000

Heat Stress Monitors


	Data Logging Capabilities	Adapters

Measure temperature, humidity, and radiant heat in your work area to keep your team safe from heat-related hazards. These monitors help you avoid dangerous conditions and comply with OSHA standards for a safe work environment. They use a variety of measurements from your surroundings to calculate the heat stress index and the wet bulb globe temperature (WBGT), which tell you how hot it feels. Set a maximum wet bulb globe temperature, and an alarm will go off when heat reaches the safety limit.

These monitors have two sensors. One measures temperature, humidity, dew point, and wet globe temperature. The other measures black globe temperature, which is the effect of direct solar radiation on an exposed surface. Carry monitors with you to measure different areas, or mount to your tripod to measure conditions over time.

Calibration Certificate Traceable to NIST—Monitors that come with a calibration certificate traceable to NIST have passed a test for accuracy.

Cannot Be Sold to Canada—Import regulations restrict sales to Canada.

Adapters—Power these monitors with the included batteries, or add a power adapter to plug them in.

	Monitors																	Adapters
	Air Temp.		Black Globe Temp.		Wet Bulb Globe Temp.		Barometric Pressure		Relative Humidity		Mounting
	Range, ° F	Accuracy	Range, ° F	Accuracy	Range, ° F	Accuracy	Range, in. Hg	Accuracy	Range	Accuracy	Fasteners Included	No. of	Hole Thread Size	Data Connection	Cannot Be Sold To		Each	Input Voltage, V AC	Output Voltage, V DC	Current, amp	Lg., ft.		Each
Heat Stress Monitors







				LCD Display Monitors

				32 to 122	±1.1° F	32 to 176	±1.8° F	59 to 132	±3.6° F	8.9 to 32.5	±0.044 in. Hg	0% to 100%	±5%	No	1	1/4"-20	—	Canada	0000000	0000000	100 to 240	9	0.5	6	0000000	000000




						LCD Display Monitors with NIST Certificate

						32 to 122	±1.1° F	32 to 176	±1.8° F	59 to 132	±3.6° F	8.9 to 32.5	±0.044 in. Hg	0% to 100%	±5%	No	1	1/4"-20	—	Canada	0000000	000000	100 to 240	9	0.5	6	0000000	00000


						Data Logging Heat Stress Monitors







										LCD Display Monitors

										32 to 122	±1.5° F	32 to 176	±1.1° F	32 to 132	±3.6° F	—	—	5% to 95%	±3%	No	1	1/4"-20	Standard SD Card	Canada	0000000	000000	120	9	0.8	4	0000000	00000




												LCD Display Monitors with NIST Certificate

												32 to 122	±1.5° F	32 to 176	±1.1° F	32 to 132	±3.6° F	—	—	5% to 95%	±3%	No	1	1/4"-20	Standard SD Card	Canada	0000000	000000	120	9	0.8	4	0000000	00000

Accessories for Heat Stress Monitors

Humidity Calibrators

To maintain their accuracy, monitors should be calibrated once a year. You can calibrate the monitor yourself using humidity calibrators. These calibrators contain a known humidity, so you can adjust your monitor until it reads the humidity correctly.

RH	RH Accuracy		Each
33%, 75%	±1%	0000000	0000000

			Inside
Ht.	Wd.	Dp.	Ht.	Wd.	Dp.	Wt., lb.	Color	Material	Lock Type	Foam Type		Each
5 3/4"	13"	12"	5 1/2"	12"	9 1/2"	4 1/2	Black	Plastic	Padlockable	Cubed	0000000	000000