Model 446580 Version 2.0 June 2004
2
Warranty
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and
workmanship for one year from date of shipment (a six month limited warranty applies to sensors and cables).
If it should become necessary to return the instrument for service during or beyond the warranty period,
contact the Customer Service Department at (781) 890-7440 ext. 210 for authorization or visit our website
www.extech.com for contact information. A Return Authorization (RA) number must be issued before any
product is returned to Extech. The sender is responsible for shipping charges, freight, insurance and proper
packaging to prevent damage in transit. This warranty does not apply to defects resulting from action of the
user such as misuse, improper wiring, operation outside of specification, improper maintenance or repair, or
unauthorized modification. Extech specifically disclaims any implied warranties or merchantability or fitness for
a specific purpose and will not be liable for any direct, indirect, incidental or consequential damages. Extech's
total liability is limited to repair or replacement of the product. The warranty set forth above is inclusive and no
other warranty, whether written or oral, is expressed or implied.
Specifications
General Specifications
Display
Multi-function 3 ½ digit (2000 count) LCD display
Measurement
Relative Humidity% (RH) and Temperature
(°
C
&
°
F)
Data Hold
Freezes Display
Datalogger (446580)
Records approx. 7000 readings
Data Output
446580: RS 232 PC serial interface
4465CF: Analog 10mvDC per
°
C/F or %RH
Response Time
Humidity
45% to 95%:
≤
3 minutes
95% to 45%:
≤
5 minutes
Measurement rate
4465CF: 2.5 readings per second
446580: 1 reading per second
Operating Temperature 4465CF: 32 to 122
°
F (0 to 50
°
C
)
446580: 32 to 104
°
F (0 to 40
°
C
)
Operating Humidity
<
80% RH
Storage Temperature
14 to 140
°
F (-10 to 60
°
C)
Storage Humidity
<
70% RH
Power Supply
9V battery
Battery life
4465CF: 400 hours; 446580: 50 hours (approx.)
Weight
4465CF: 7.0 oz. (198 g); 446580: 7.1 oz. (200 g)
Size
10.6 x 2.7 x1.0" (180 x 72 x 32mm)
Measurement Specifications
Range
Resolution
Accuracy (Full Scale)
% Relative
Humidity
10% to 95% RH
0.1% RH
30 to 95% RH: ±3% RH
10 to 30% RH: ±7% RH
Temperature
4
ο
F to 140
ο
F
(20
ο
C to 60
ο
C)
0.1
ο
F/C
±1.5
ο
F (±0.8
ο
C)
