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

(20

0.1

±1.5