UEi INF225 User Manual Download Page 1

INF225

30:1 Dual Laser 

Infrared Thermometer

Limited Warranty

The INF225 is warranted to be free from defects in materials and 
workmanship for a period of three year from the date of purchase. If 
within the warranty period your instrument should become inoperative 
from such defects, the unit will be repaired or replaced at UEi’s option. 
This warranty covers normal use and does not cover damage which 
occurs in shipment or failure which results from alteration, tampering, 
accident, misuse, abuse, neglect or improper maintenance. Batteries 
and consequential damage resulting from failed batteries are not 
covered by warranty. 

Any implied warranties, including but not limited to implied warranties 
of merchantability and fitness for a particular purpose, are limited 
to the express warranty. UEi shall not be liable for loss of use of the 
instrument or other incidental or consequential damages, expenses, or 
economic loss, or for any claim or claims for such damage, expenses 
or economic loss. 
A purchase receipt or other proof of original purchase date will be 
required before warranty repairs will be rendered. Instruments out of 
warranty will be repaired (when repairable) for a service charge. 

This warranty gives you specific legal rights. You may also have other 
rights which vary from state to state.

EMISSIVITY

Emissivity is the relative ability of a surface to emit energy by radition. Each 
type of surface (metal, brick, wood, etc.) has a different emissivity level 
which must be accounted for when taking a measurement with an infrared 
thermometer. 

The INF225 has a variable emissivity from 0.10 to 1.00 which allows 
accurate measurement of most types of materials. Shiny bright surfaces 
(i.e. chrome, new copper, white boards) have a much lower emissivity 
than flat black materials. The emissivity of the INF225 should be set 
manually according to the chart below in order to obtain the most accurate 
measurements. The chart is for guidance only, as the emissivity of objects 
varies depending on surface finish, measurement wavelength, field of view, 
temperature, and the shape of the object.

Material

Emissivity

Asphalt

0.93

Red Brick

0.93

Gray Brick

0.75

Porcelain Ceramic

0.92

Fired Clay

0.91

Rough Concrete

0.94

Cotton Cloth

0.77

Smooth Glass

0.92-0.94

Granite

0.45

Gravel

0.28

Smooth Ice

0.97

Smooth White Marble

0.56

Black Paint

0.96

Hard Rubber

0.94

Wood

0.80-0.90

Matte Copper

0.22

Commercial Sheet Aluminum

0.09

Cold Rolled Steel

0.75-0.85

BATTERY REPLACEMENT

1.

Open 

the battery compartment by pulling the compartment lid at the 

indentations, away from the trigger (see 

Thermometer Attributes 

section).

2.

Remove 

and recycle exhausted batteries.

3.

Replace 

2 x AAA alkaline batteries observing the polarity indicated 

on the inside markings.

4.

Return 

compartment lid and make sure it locks into place.

ACCURACY

Ambient 
Temperature

Target  
Temperature

Accuracy

77°F

59~95°F(15~35°C)

±1.8°F (1.0°C)

68~79°F (20~26°C) 32~1400°F

(0~760°C)

±4°F (2°C)

68~79°F (20~26°C) -76~32°F

(-60~0°C)

±(4°F+0.1 degree/degree)
±(2°C+0.05 degree/degree)

K type 
Thermocouple*

-83~2552˚F
(-64~1400˚C)

±1% of Reading 
or 1.8˚F (1.0˚C)

* Probe accuracy not specified

INSTRUCTION MANUAL

&/(-*4)

30:1 Dual Laser 

Infrared Thermometer

INF225

PLEASE

RECYCLE

17023 12/13

Copyright © 2013 UEi. All Rights Reserved

Diameter at Spot

Distance to Object

0.5”

1”

2”

4”

15”
30”
60”

120”

DISTANCE TO SPOT RATIO

DUAL LASER TARGETING

The distance-to-spot ratio is a representation of how focused the IR sensor 
is on the measurement area. The closer you are to the surface you are 
measuring, the smaller the area of measurement is. 

The INF225 has a 30:1 distance-to-spot ratio. This means that if you are  
30 feet away from an air vent, the vent should be 1 foot or less in diameter 
in order to resolve the most accurate measurement. 

Below is an illustration of other example measurements.

Dual (split) Laser 
indicates the actual 
target diameter.

Mode

C˚/ F˚

Lock

1”

30”

Mode

C˚/ F˚

Lock

www.

.com

[email protected]

1.800.561.8187

Summary of Contents for INF225

Page 1: ...INSTRUCTION MANUAL 4 30 1 Dual Laser Infrared Thermometer INF225 Mode C F Lock ...

Page 2: ... these warnings can result in severe injury or death UÊ Do not direct laser beam into eyes as this can cause permanent eye damage UÊ Do not use the instrument if the case is damaged in any way UÊ Replace the batteries as soon as low battery indicator appears UÊ Have the instrument serviced immediately if it is acting abnormally UÊ Be cautious of readings of reflective materials as they may be indic...

Page 3: ... store 2 x AAA batteries 5 Dual Laser Provides an approximate target area for making measurements 6 LCD Screen Displays measurement and additional information 7 Mode Button Changes the mode of the secondary display 8 Down Button Changes temperature scale decreases threshold decreases emissivity or toggles laser depending on the mode 9 Up Button Enters auto scan trigger lock mode increases threshol...

Page 4: ... be held down to activate the laser but is not required Auto Hold The INF225 will hold the last temperature measured for 60 seconds after the trigger is released To recall this value or associated calculations press the MODE key to activate the display and show the held temperature In probe mode the unit will automatically power off after 12 minutes In auto scan mode the unit will automatically po...

Page 5: ...down E Shows the difference between the highest and lowest measurements taken while the trigger is held down F Shows the average of all readings taken while the trigger is held down G Sets the threshold for an alarm that will sound whenever the measured temperature is greater than the alarm threshold H Sets the threshold for an alarm that will sound and flash whenever the measured temperature is le...

Page 6: ...for guidance only as the emissivity of objects varies depending on surface finish measurement wavelength field of view temperature and the shape of the object Material Emissivity Asphalt 0 93 Red Brick 0 93 Gray Brick 0 75 Porcelain Ceramic 0 92 Fired Clay 0 91 Rough Concrete 0 94 Cotton Cloth 0 77 Smooth Glass 0 92 0 94 Granite 0 45 Gravel 0 28 Smooth Ice 0 97 Smooth White Marble 0 56 Black Paint 0...

Page 7: ...t 0 5 1 2 4 15 30 60 120 DISTANCE TO SPOT RATIO DUAL LASER TARGETING The distance to spot ratio is a representation of how focused the IR sensor is on the measurement area The closer you are to the surface you are measuring the smaller the area of measurement is The INF225 has a 30 1 distance to spot ratio This means that if you are 30 feet away from an air vent the vent should be 1 foot or less i...

Page 8: ...iled batteries are not covered by warranty Any implied warranties including but not limited to implied warranties of merchantability and fitness for a particular purpose are limited to the express warranty UEi shall not be liable for loss of use of the instrument or other incidental or consequential damages expenses or economic loss or for any claim or claims for such damage expenses or economic l...

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