Digi-Sense 20250-21 User Manual
User Manual
THE STANDARD IN PRECISION MEASUREMENT
Professional Thermohygrometer
with NIST-Traceable Calibration
Model 20250-21
2
Introduction
The Digi-Sense Professional Thermohygrometer (Model
20250-21) offers fast response and high accuracy.
This heavy-duty meter measures humidity (relative and
absolute), temperature, plus it calculates dew point and
wet bulb. Advanced features include data Hold, Min/Max
readings, and automatic power-off. The instrument is fully
tested and calibrated to NIST-traceable standards. Careful
use of this meter will provide years of reliable service.
Unpacking
Check individual parts against the list of items below. If
anything is missing or damaged, please contact your
instrument supplier immediately.
1. Meter
2. Carrying case
3. One 9 V battery
4. User manual
5. NIST-traceable calibration report with data
3
Meter Description
1. Humidity/temperature sensor
2. LCD
3.
Backlight button
4. WBT/DP/°C/°F button (wet bulb, dew point,
temperature units)
5. MAX/MIN button
6.
Power on/off button
7. MODE button (%RH, g/m
3
, gr/ft3)
8. HOLD button
1
2
3
4
5
8
7
6
4
Display Layout
1. Relative humidity unit
2. Absolute humidity unit (grams per cubic meters)
3. Absolute humidity (grains per cubic feet)
4. Humidity displayed reading
5. °C temperature unit
6. °F temperature unit
7. Dew point icon
8. Wet bulb icon
9. Hold icon
10. Minimum reading icon
11. Maximum reading icon
12. Low-battery indication
13. Auto power-off icon
14. Temperature / DP / WB displayed reading
15. Absolute humidity icon
1
15
14
4
5
6
7
8
2 3
13 12 11 10 9
Loading...