DIGI-SENSE DIGI-SENSE 20250-25 Manual
THE STANDARD IN PRECISION MEASUREMENT
User Manual
Professional Dual-Laser Infrared Thermometer
with 50:1 Distance-to-Sight Ratio, Data Logging
®
with Bluetooth
Smart App, Single Type K Input,
and Temperature Alarm
with NIST-Traceable Calibration
Model 20250-25
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Introduction
The Digi-Sense Professional Dual-Laser Infrared Thermometer with
Bluetooth
®
Connectivity (model 20250-25) with 50 to 1 distance-to-sight
ratio offers fast response and high accuracy. This heavy-duty IR meter is
ideal for a wide range of applications including food preparation, safety and
fire inspection, plastic molding, marine, HVAC, and fleet maintenance.
Advanced features include internal data logging, USB interface for data
transmission, temperature alarm, adjustable emissivity, temperature differential, data Hold, Max/Min/Avg readings, and auto power-off. The meter
also supports contact measurement through a type K thermocouple input.
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. One type K flexible probe
3. Software
4. Tripod
5. Carrying case
6. One 9 V battery
7. User manual
8. NIST-traceable calibration report with data
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Key Features
• Bluetooth interface
• User-friendly mobile app
• 50:1 Distance-to-sight ratio
• 1% basic accuracy
• Dual laser sighting
• Internal data logging up to 32K IR readings
• Contact measurements via type K thermocouple input
• Precise noncontact IR measurements
• Rapid detection function
• Adjustable emissivity from 0.10 to 1.0
• User-selectable ºC or ºF units
• Automatic data Hold
• MAX/MIN/AVG temperature displays
• Temperature differential
• High and low alarms (audible)
• Automatic selection range and display resolution
• Trigger lock
• Backlight Dot-matrix display
• Automatic power-off to conserve battery life
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Meter Description
1. IR sensor
2. Laser pointer beam
3. Type K thermocouple input
4. USB power port
5. Dot-matrix display
6. F1 / Down button
7. F2 button
8. F3 / Up button
9. MODE button
10. Lens cover with magnetic lock
11. Measurement trigger
12. Battery cover
13. Handle grip
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Display Layout
1. SCAN/HOLD measuring
indicator
2. Laser pointer indicator
3. Bluetooth icon (transmit data)
4. Current time
5. Low-battery indicator
6. Emissivity or type K
temperature readout
7. MAX or AVG icons
8. Current temperature readout
9. MIN or DIF icons
10. °C and °F temperature icons
11. Bar graph
12. Menu - Level 1
13. Menu - Level 2
14. Menu - Level 3
15. Menu - Level 4
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0.00
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How it Works
Infrared thermometers measure the surface temperature of an object. The unit’s
optics sense emitted, reflected, and transmitted energy, which is collected and
focused onto a detector. The unit’s electronics translate the information into a
temperature reading which is displayed on the unit. The laser is used for aiming
purposes only.
Field of View
Make sure that the target is larger than the unit’s spot size. The smaller the target,
the closer you should be to it. When accuracy is critical, make sure the target is at
least twice as large as the spot size.
Distance and Spot Size
As the distance (D) from the object increases, the spot size (S) of the area measured
by the unit becomes larger.
Locating a Hot Spot
To find a hot spot, aim the thermometer outside the area of interest, then scan
across with an up-and-down motion until you locate the hot spot.
Emissivity
Emissivity is a term used to describe the energy-emitting characteristics of materials.
Most (90% of typical applications) organic materials and painted or oxidized
surfaces have an emissivity of 0.95 (preset in the unit). Inaccurate readings will
result from measuring shiny or polished metal surfaces. To compensate, cover
the surface to be measured with black tape or flat black paint. Allow time for the
tape to reach the same temperature as the material underneath it. Measure the
temperature of the tape or painted surface. (Refer to table on facing page.)
Good Measuring Practices
Holding the meter by its handle, point the IR sensor toward the object whose
temperature is to be measured. The meter automatically compensates for
temperature deviations from ambient temperature. Keep in mind that it will
take up to 30 minutes for the IR sensor to stabilize if going from ambient
temperatures to a much higher (or lower) temperature measurement.
Reminders
• The unit is not recommended for measuring shiny or polished metal surfaces
(stainless steel, aluminum, etc.). See Emissivity above.
• The unit cannot measure through transparent surfaces such as glass. It will
measure the surface temperature of the glass instead.
• Steam, dust, smoke, etc. can prevent accurate measurement by obstructing
the unit’s optics.
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