Digi-Sense 20250-33 User manual

User Manual
THE STANDARD IN PRECISION MEASUREMENT
Pen-Style Pocket Thermometer
with NIST-Traceable Calibration
Model 20250-33

2
Introduction
The Digi-Sense Pen-Style Pocket Thermometer (Model
20250-33) offers fast response and laboratory accuracy with
0.1°C/0.1°F resolution over the entire measurement range.
Advanced features include °F/°C unit selection, Min/Max/
Hold, 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. Pocket thermometer
2. One LR44 (1.5V) battery, installed
3. Protective sleeve
4. User manual
5. NIST-traceable calibration report with data
Key Features
• User-selectable °C or °F units
• Min/Max/Hold function
• Automatic power-off to conserve battery life
• Rubberized protective housing

3
Setup and Operation
Power
Remove the thermometer from
its protective sleeve and press
the Power ON/OFF button to
turn thermometer on.
Taking Measurements
1. For best results, insert the stem of the thermometer
at least ½ inch into the testing area.
2. When the thermometer is turned on, the LCD will
show “0.0°C” or “32.0°F” for two seconds. Then the
actual temperature will display. To save battery life,
the thermometer will automatically turn off after
approximately 20 minutes.
Changing Unit of Measure
Change the temperature unit from °C to °F by pressing
the °C/°F button.
Meter Description
1. Protective cover
2. Temperature probe
3. LCD
4. °C/°F button
5. Power ON/OFF button
6. HOLD/MAX/MIN button
1
2
3
45
6

4
Setup and Operation (continued)
Hold Function
1. Press the HOLD button once. “Hold” will appear on the
display.
2. Press the HOLD button three times to exit the hold
function.
Viewing the Min and Max Readings
The MIN/MAX mode allows the user to view only the
lowest (MIN) or highest (MAX) reading.
1. Press the HOLD button twice and the MAX icon appears
on the display. The LCD is now displaying the highest
temperature reading.
2. Press the HOLD button once more and the MIN icon
appear on the display. The LCD is now displaying the
lowest temperature reading.
3. Press the HOLD button once more to exit the MIN/MAX
mode.
Note: While powering on the thermometer each time, it
restarts recording Minimum and Maximum, and the
recordings don’t stop until the meter is turned off.

5
Specifications
Temperature Full usable range: –40 to 482°F (–40 to 250°C)
NIST certified range: 32 to 300°F (0 to 150°C)
Resolution 0.1°F/C
Accuracy 1.5% ±4°F (±2°C) full scale
Display LCD
Response time 20 seconds
Auto power-off Unit shuts off automatically after 20 minutes
to preserve battery life
Weight 1.5 oz (42.5 g)
Dimensions (L x W x H) 81⁄4" x 11⁄4" x 3⁄4" (211 x 32 x 19 mm)
Power One LR44 (1.5V) battery

6
Maintenance, Recalibration, and Repair
Cleaning and Storage
• Thermometer should be cleaned with a damp cloth and
mild detergent when necessary. Do not use solvents or
abrasives.
• Store the meter in an area with moderate temperature and
humidity.
Battery Replacement
If the battery power falls low, open the battery cover (Fig. 2)
and replace the LR44 battery (Fig. 1). Close the cover securely.
(Fig. 1)
(Fig. 2)

7

For Product and Ordering Information, Contact:
Manual Part No. 00100-64
1065DGMAN_20250-33 Rev.1
It is recommended that Digi-Sense products are calibrated
annually to ensure proper function and accurate measure-
ments; however, your quality system or regulatory body may
require more frequent calibrations.