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Data Sheet
RH Meter with Wireless
Perform precision temperature and humidity measurement for
HVAC, Indoor Air Quality and environmental applications. The
large LCD display, full suite of measuring features and two
temperature probes (internal and external) make this product a
preferred choice for a professional.
THWD-10W
Wireless two ways transmission
Highly stable humidity measurement ±2.5%
Processing relative humidity and temperature measurements
simultaneously
Two temperature sensors (internal and external)
Wet/dry bulb, dew point measurement
Easy selection between K/NTC/K-DP
MAX/MIN/Average/Relative Zero and HOLD functions
Amprobe® Test Tools www.Amprobe.com
Data Sheet
General Specifications
Display 5 digit liquid crystal display (LCD).
Polarity Automatic, positive implied, negative polarity indication.
Low Battery Indication The “ ” is displayed when the battery voltage drops below the operating level.
Operating Environment 0°C to 50°C (32°F to 122°F) <80% R.H.
Auto Power Off 5 minutes
Storage Environment -20°C to 60°C (-4°F to 140°F) <70% R.H. with battery removed from meter
Accuracy Stated accuracy at 23°C ±5°C, <75% R.H.
Battery 1.5Vx4pcs AAA size.
Battery Life 200 hours typical
Dimensions L241.3 X W157.98 XH76.2mm (9.5 X 6.22 X3 in).
Weight Approx. 304g (0.67 lb) including batteries.
WIRELESS Features
Frequency Range 910~920MHz.
Low current consumption less than 1mA.
The transmitting distance can reach 25M without magnetic interference.
THWD-10W RH Meter with Wireless
Amprobe® Test Tools www.Amprobe.com
Data Sheet
Electrical Specifications
Temperature Scale Celsius or Fahrenheit user-selectable
Measurement Range K-Type -50°C to 1000°C, (-50°F to 1832°F)
Resolution 0.1°C or 0.2°F
Accuracy Accuracy is specified for operating temperatures over the range of 18°C to 28°C (64°F to 82°F), for 1
year, not including thermocouple error. ±(0.1% rdg + 1°C) on -50°C to 1000°C ±(0.1% rdg + 2°F) on
-50°F to 1832°F ±(0.05% rdg + 1.4°F) -58°F to -328°F
Sensor Thermistor temperature sensor
Range 0°C to 60°C, (32°F to 140°F)
Resolution 0.1°C/°F
Accuracy ±2°C on 0°C to 10°C ±0.5°C on 10°C to 45°C ±2°C on 45°C to 60°C ±4°F on 32°F to 50°F ±1°F on 50°F to
113°F ±4°F on 113°F to 140°F
RELATIVE HUMIDITY
Sensor Capacitive Humidity Sensor
Range 0% to 100% RH
Accuracy ±2.5% at 25°C (77°F), 10% to 90% RH,
±5% at 25°C (77°F), 0% to 10% RH,
90% to 100% RH
Sensor Response Time 60 sec typical
for 90% of Total Range
Sensor Hysteresis ±1%RH typical
(excursion of 10% to 90% to 10% RH)
Temperature 0.1 times the applicable accuracy
Coefficient Specification per °C from 0°C to 18°C and 28°C to 50°C (32°F to 64°F and 82°F to 122°F).
Input Protection 24V dc or 24V ac rms maximum input Voltage on any combination of input pins.
Input Connector Accepts standard miniature thermocouple connectors (flat blades spaced 7.9mm, center to center).
THWD-10W RH Meter with Wireless
Amprobe® Test Tools www.Amprobe.com
Data Sheet
©2010 Amprobe Test Tools. All rights reserved.
6/2010 THWD-10W_DS Rev A
Amprobe® Test Tools
website: www.Amprobe.com
email: info@amprobe.com
Everett, WA 98203
Tel: 877-AMPROBE
Amprobe® Test Tools Europe
In den Engematten 14
79286 Glottertal, Germany
Tel.: +49 (0) 7684 8009 - 0
THWD-10W RH Meter with Wireless
