THWD-3
Relative Humidity
Temperature Meter
Data Sheet
No hassle
warranty
No waiting.
No shipping
charges.
Our commitment to
high-quality products
and customer service
is demonstrated by
our industry exclusive
“No Hassle” warranty.
In the unlikely event
that an Amprobe Test
Tool requires warranty
service, any of our
local dealers are
authorized to replace
it, on the spot.
Dual display ■
Extended probe stem to ■
easily access air ducts
Dew Point ■
Wet Bulb ■
Min/Max readings ■
Data Hold ■
Capacitive sensor with ■
protective cover
Auto Power off ■
Carrying Case ■
One year warranty ■
The THWD-3 uses a precision capacitance sensor to deliver
accurate performance with long term stability. This high
accuracy instrument measures the full range of relative
humidity from 0% to 100% and features an exceptionally
wide ambient temperature measurement range from
-20 °C (-4 °F) to 60 °C (140 °F). The sensor is mounted on a
long shaft extending from the top surface of the unit,
making probing into ductwork and hard to reach areas
more easy. The large LCD displays two measurements
simultaneously with a full range of display options
including Hold, Min, Max, Dew Point (DP) and Wet Bulb
(WB). The THWD-3 comes with soft carrying case, sensor
cover, battery and manual.
Included Accessories
Carrying case, sensor cover,
battery (installed), users manual
(note: $500 MSLP limit)
Amprobe® Test Tools
www.Amprobe.com
THWD-3 Relative Humidity Temperature Meter
Data Sheet
General Specifications
Display Dual display
Operating Conditions: 0 °C to 40 °C
Storage Conditions: -10 °C to 60 °C; <70 % RH
Altitude Up to 2000 meters
Sample rate 2.5 times per second
Battery 9 V Battery, NEDA 1604 or JIS 006P or IEC6F22
Battery life 85-hours continuous (with alkaline battery)
Dimension 240 x 54 x 34 mm (9.5 x 2.1 x 1.3 in.)
Weight Approximately 180 g (6.4 oz.)
Technical Specifications
Function Range Accuracy
Measurement Ranges
Humidity 0 % RH to 100 % RH
5 % RH to 95 % RH: ±3 % RH @ 23 °C
<5%RH, >95% RH ±5 % RH @ 23 °C
Temperature Coefficient: 0.1 x specified accuracy/ °C <23 °C, >23 °C
Resolution 0.1 %RH
Temperature (Dry Bulb) -20 °C to 60 °C: ±0.8 °C
-4 °F to -140 °F ±1.6 °F
Dew Point (DP) -20 °C to 60 °C: ±0.8 °C
-4 °F to -140 °F ±1.6 °F
Web Bulb (WB) -20 °C to 60 °C: ±0.8 °C
-4 °F to -140 °F ±1.6 °F
Resolution 0.1 °C/0.1 °F
Response time (in slowly moving air)
Humidity 180 sec
Temperature 10 sec
Amprobe® Test Tools
website: www.Amprobe.com
email: info@amprobe.com
Everett, WA 98203
Tel: 877-AMPROBE
Amprobe® Test Tools
Amprobe® Test Tools Europe
In den Engematten 14
79286 Glottertal, Germany
Tel.: +49 (0) 7684 8009 - 0
©2007 Am probe Test Tools. A ll right s rese rved.
5/20 07 3052169 EN-NP Rev A
www.Amprobe.com