Temperature Sensor

0° to 50°C

32° to 122°F

±0.21°C from 0° to 50°C, see manual for plot

±0.38°F from 32° to 122°F, see manual for plot

0.024°C at 25°C , see manual for plot

0.04°F at 77°F , see manual for plot

<0.1°C per year

0.18°F per year

RH Sensor*

1% to 90% RH (non-condensing)

±2% from 20% to 80% typical to a maximum of ±4.5% including hysteresis at 25°C (77°F); below 20% and above 80% ±6% typical

0.01%

<1% per year typical

CO2 Sensor

0 to 5,000 ppm

±50 ppm ±5% of reading at 25°C (77°F), less than 90% RH (non-condensing) and 1,013 mbar

15 seconds

Auto or manual to 400 ppm

<1% of FS

0.13% of reading per mm Hg (corrected via user input for elevation/altitude)

950 to 1,050 mbar (use Altitude Compensation for outside of this range)

-305 to 5,486 m

-1,000 to 18,000 ft

Non-dispersive infrared (NDIR) absorption

Response Time

12 minutes to 90% in airflow of 1 m/s

12 minutes to 90% in airflow of 2.2 mph

1 minute to 90% in airflow of 1 m/s

1 minute to 90% in airflow of 2.2 mph

1 minute to 90% in airflow of 1 m/s

1 minute to 90% in airflow of 2.2 mph

Logger

1 mW

0 dBm

Approximately 30.5 m line-of-sight

Approximately 100 ft line-of-sight

Bluetooth Low Energy (Bluetooth Smart)

0° to 50°C ; 0 to 95% RH (non-condensing)

32° to 122°F ; 0 to 95% RH (non-condensing)

1 second to 18 hours

Fixed interval (normal, statistics) or burst

Wrap when full or stop when full

Immediate, push button, date & time, or next interval

When memory full, push button, date & time, or after a set logging period

±1 minute per month at 25°C

±1 minute per month at 77°F

4 AA 1.5 Volt batteries (user replaceable) or USB power source (5 V DC, 2 Watts)

6 months, typical with logging and sampling intervals of 5 minutes or slower; 6 months or less with logging and sampling intervals faster than 5 minutes while logging CO2. Entering burst logging mode will impact battery life. With app use, battery life can be reduced by remaining connected, excessive readouts, audible alarms, and paging. Visual/audible alarms and other events can have a marginal impact on battery life.

128 KB (84,650 measurements, maximum)

USB 2.0 interface or via Bluetooth Smart

20 seconds via USB; approximately 60 seconds via Bluetooth Smart, may take longer the further the device is from the logger

LCD is visible from 0° to 50°C;

LCD is visible from 32° to 122°F;

the LCD may react slowly or go blank in temperatures outside this range

7.62 x 12.95 x 4.78 cm

3.0 x 5.1 x 1.88 inches

267.4 g

9.43 oz

IP50