Extech Extech RH101 Manual

User's Guide

Hygro-Thermometer +
InfraRed Thermometer

Model RH101

Patented

99 Washington Street
Melrose, MA 02176

Phone [phone]
Toll Free 1-800-517-8431

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

FAX [phone] - TestEquipmentDepot.com

Visit us at www.TestEquipmentDepot.com

Back to the Extech RH101 Product Info Page

Introduction

Congratulations on your purchase of the Extech Hygro-Thermometer plus InfraRed
Thermometer. This device measures relative humidity, air temperature (with probe), and
surface temperature (with the InfraRed function). The large, easy-to-read backlit LCD
includes primary and secondary displays plus numerous status indicators. The InfraRed
feature includes a laser pointer for convenient targeting. Careful use of this meter will
provide years of reliable service.

Specifications

Function Range and Resolution Accuracy
Humidity 10.0 to 95.0% RH ± 3.5% RH
Air Temperature -4 to 140oF (-20 to 60oC) ± 3.0oF (± 2.0oC)
IR Temperature

Display Dual LCD with Backlight and status indicators
Sensor Type Humidity: Precision capacitance sensor

Response Time IR Temperature: 0.5 seconds; Probe Temperature and

Accuracy note Accuracy is specified for the following ambient temperature

Sampling Rate 2.5 samples per second
InfraRed Emissivity 0.95 (fixed)
IR Field of View D/S = Approx. 8:1 ratio (D = distance, S = spot)
Laser power Less than 1mW
IR Spectral Response 6 to 14 μm (wavelength)
Operating Conditions 32 to 122
Storage Conditions 14 to 140
Power Supply 9V Battery with auto power off (after 10 minutes)
Battery Life Approx. 24 hours (if Backlight and Laser are used continuously

Dimensions / Weight 5.9 x 2.8 x 1.4” (150 x 72 x 35mm); 8.3 oz. (235g)
Patent Notice U.S. Patent 7168316

-58.0 to -4.0oF (-50.0 to -20.0oC) ± 9oF (± 5oC)

-4.0 to 199.9oF (-20.0 to 93.3oC)
200 to 400oF (93oC to 204oC)

o

400 to 932

F (204oC to 500oC) ± 3% of rdg

± 2% of rdg or ± 4

Temperature: Thermistor (probe) and InfraRed

Relative Humidity: 3 minutes

range: 64 to 82°F (18 to 28°C)

o

F (0 to 50oC); < 80% RH non-condensing

o

F (-10 to 60oC); <80% RH non-condensing

the battery life is reduced to 2 to 3 hours approx.)

o

F (± 2oC)

Safety

• Use extreme caution when the laser pointer beam is on

• Do not point the beam toward anyone's eye or allow the beam

to strike the eye from a reflective surface

• Do not use the laser near explosive gases or in other
potentially explosive areas

RH101 V2.1 8/07 2