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FLEXIBLE INFRARED
THERMOMETER
Model
94233
ASSEMBLY AND OPERATING INSTRUCTIONS
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright© 2006 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork con-
tained herein may be reproduced in any shape or form without the express written consent of Harbor Freight
Tools. Diagrams within this manual may not be drawn proportionally. Due to continuing improvements, actual
product may differ slightly from the product described herein. Tools required for assembly and service may not
be included.
Revised Manual 10c
For technical questions or replacement parts, please call 1-800-444-3353.
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Specifications
LASER LIGHT
DO NOT STARE INTO BEAM
Max. Output: 1mW,
Wavelength: 650 nm
CLASS II LASER PRODUCT
This product complies with
21 CFR 1040.10 and 1040.11
CEN-TECH
3491 Mission Oaks Blvd.,
Camarillo, CA, USA, 93011
Manufacture Date: ___________, _______
Features Flexible 14-1/8” Shaft
Display
Polarity
Measurement Range
Resolution
Power Supply 9V Battery (included)
Distance to Spot Ratio 8 to 1
Emissivity Fixed @ .95
LCD w/White Backlight,
Auto Data Hold Laser Guide
Automatic (no indication for
positive polarity): Minus (-)
sign for negative polarity
-58°F to 1112°F
(-50°C to 600°C)
(0.1° up to 200°,
1° over 200 °)
Save This Manual
You will need the manual for the safety warnings and precautions, assembly instructions,
operating and maintenance procedures, parts list and diagram. Keep your invoice with this
manual. Write the invoice number on the inside of the front cover. Keep the manual and
invoice in a safe and dry place for future reference.
Safety Warnings and Precautions
WARNING: When using tool, basic safety precautions should always be followed to
reduce the risk of personal injury and damage to equipment.
Read all instructions before using this tool!
1. Keep work area clean. Cluttered areas invite injuries.
2. Observe work area conditions. Do not use the Flexible Infrared Thermometer in
damp or wet locations. Don’t expose to rain. Keep work area well lighted. Do not use
electrically powered tools in the presence of flammable gases or liquids.
3. Keep children away. Children must never be allowed in the work area. Do not let
them handle the Flexible Infrared Thermometer.
4. Store idle equipment. When not in use, tools must be stored in a dry location to
inhibit rust. Always lock up tools and keep out of reach of children.
5. Use the right tool for the job. Do not attempt to force a small tool or attachment to
do the work of a larger industrial tool. There are certain applications for which this
tool was designed. It will do the job better and more safely at the rate for which it was
intended. Do not modify this tool and do not use this tool for a purpose for which it
was not intended.
6. Dress properly. Protective, electrically nonconductive clothes and nonskid footwear
are recommended when working. Wear restrictive hair covering to contain long hair.
7. Use eye protection. Always wear ANSI approved impact safety goggles.
For technical questions, please call 1-800-444-3353
REV 06g; REV 06i
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8. Maintain tools with care. Keep the Flexible Infrared Thermometer clean for better
and safer performance. The handle must be kept clean, dry, and free from oil and
grease at all times.
9. Disconnect power. Turn off tool when not in use. Remove battery when not in use for
a week.
10. Stay alert. Watch what you are doing, use common sense. Do not operate any tool
when you are tired.
11. Check for damaged parts. Before using any tool, any part that appears damaged
should be carefully checked to determine that it will operate properly and perform
its intended function. Check for any broken parts or mounting fixtures; and any
other condition that may affect proper operation. Any part that is damaged should
be properly repaired or replaced by a qualified technician. Do not use the tool if any
button does not turn On and Off properly.
12. Guard against electric shock. Prevent body contact with grounded surfaces such as
pipes, radiators, ranges, and refrigerator enclosures..
13. Do not operate tool if under the influence of alcohol or drugs. Read warning
labels if taking prescription medicine to determine if your judgment or reflexes are
impaired while taking drugs. If there is any doubt, do not operate the tool.
14. Maintenance. For your safety, service and maintenance should be performed
regularly by a qualified technician.
15. Laser beams can cause permanent damage to eyes. Never point the laser beam
at another human or animal. Caution: Do not allow the beam to reflect on a surface;
this could damage your eyes.
16. Do not allow the laser light beam to reflect on any gas; this could cause an
explosion.
17. CAUTION - The use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
18. CAUTION - The use of optical instruments with this product will increase eye
hazard.
19. This Flexible Infrared Thermometer is not to be used for food service or medical
applications.
Note: Performance of this tool may vary depending on tool battery power.
Warning: The warnings, cautions, and instructions discussed in this instruction manual
cannot cover all possible conditions and situations that may occur. It must be understood by the operator that common sense and caution are factors which cannot be built
into this product, but must be supplied by the operator.
Unpacking
When unpacking, check to make sure the parts on page 8 are included. If any parts are
missing or broken, please call Harbor Freight Tools at the number on the cover of this
manual as soon as possible.
For technical questions, please call 1-800-444-3353
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Operation
Preparing to Take Measurements
Warning! Laser radiation is dangerous and can cause permanent eye damage. Do not
stare into the beam or point it at others.
Note: You will need to set the “C” or “F” key (5) to establish an LCD readout in either
Fahrenheit or Celsius. Refer to the Assembly Drawing on page 8.
1. The Thermometer automatically powers ON when the Measuring Key (7) is selected.
The Thermometer will power OFF automatically approximately 7 seconds after the
Measuring Key (7) is released. See Figure 2.
2. Make sure the target is larger than the units’s spot size. The target should be at least
twice as large. Being closer to the spot will assure accuracy.
3. Select the temperature units you wish by first pressing the Measuring Key (7) and then
the “C” or F” Key (5). Toggle back and forth to choose the correct reading.
Distance (D) to Spot Size (S)
Flexible
Thermometer
D:S = 8:1
Inches
Millimeters
8@1
200@25 400@50
16@2
32@4
800@100
64@8
1600@200
Figure 1
Special Considerations: Make sure the surface of the object is not covered with frost, dust
or other materials. For accurate results, clean all surfaces before measuring. If the surface
you are measuring is highly reflective, (while it is cool) either paint it with a heat-resistant flat
black paint or put a non-reflective tape on the spot you are measuring.
Laser Key
(4)
Backlight
Key (6)
Measure
LCD Display
Key (7)
(3)
Celsius or
Fahrenheit
Key (5)
Figure 2
For technical questions, please call 1-800-444-3353
Infrared Sensor (1)
and Laser Point
Beam (2)
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4. The Thermometer will automatically hold the last temperature reading for seven seconds
after pressing the Measuring Key (7) is pressed and released. No extra keys need to
be pressed to freeze the display reading on the LCD. See Figure 3.
5. To show the backlighting, first press the Measuring Key (7) and then press the Backlight
Key (6). Press the Laser Key (4) while pressing the Measuring Key (7) to turn the Laser
Pointer (2) ON which will activate the Infrared Sensor (1). Press the Laser Key again
to turn the Infrared Sensor (1) OFF. See Figure 5.
You are now ready to measure.
1.) Digital Readout
2.) Temperature “C” (Celsius)
3.) Temperature “F” (Fahrenheit)
4.) Measuring Indication
5.) Data Hold
6.) Low Battery Indicator
7.) Laser Point
8.) Fixed Emissivity (0.95)
Figure 3
Laser
Pointer (2)
Infrared
Sensor (1)
Figure 4
oC/o
F Select Key (5)
Laser Key (4)
Backlight Key (6)
Measuring
Key (7)
Figure 5
Measuring Operation
1. Hold the Thermometer in your hand, point the Laser Pointer (2) and Infrared Sensor (1)
toward the object to be measured. The Thermometer will automatically compensate for
temperature deviations from ambient temperature. Note: It will take up to 30 minutes
to adjust to wide ambient temperature measurements, followed by high temperature
measurements. Sometimes several minutes are required after the low or high temperature
measurements are made; a cooling process must take place for the Infrared Sensor
(1). See Figure 5.
For technical questions, please call 1-800-444-3353
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Battery Replacement
Note: The LCD will indicate the battery is weak with a flashing display. See Figure 6..
1. Remove the Screw on the back of the unit to remove the battery compartment lid.
(Screwdriver not provided).
2. Replace the battery, making sure the polarity connections on the battery correspond
to the polarity in the battery compartment. Snap the battery in place. Reattach the lid
back onto the unit. Tighten the Screw to secure. See Figure 7.
3. Replace the battery with only a new 9 Volt Battery. Check with your local Waste Disposal
Facility, available in your community, for the proper disposal of used batteries.
Low Battery
Indicator
Figure 6
Screw
9 Volt Battery (9)
Battery
Compartment Lid.
Figure 7
Recommendations and Reminders
1. This Thermometer is not recommended for use in measuring a shiny or polished metal
surface such as stainless steel, aluminum, etc.) To compensate, cover the surface to
be measured with masking tape or flat black paint. Allow the tape to reach the same
temperature as the material underneath.
2. This unit cannot measure through transparent surfaces such as glass or clear plastic.
3. Steam, dust, smoke, etc. can prevent an accurate measurement.
For technical questions, please call 1-800-444-3353
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Emissivity
1. Most organic materials and painted or oxidized surfaces have an emissivity of 0.95
(pre-set in the unit). Inaccurate readings will result from measuring a shiny or polished
metal surface. See recommendations on page 6 for obtaining an accurate reading and
refer to the chart below.
Maintenance
1. Keep the unit clean. Wipe it down with a lint free cloth.
2. Make sure the laser is clear of any dirt or debris.
3. Remove the battery if you are not using the unit for extended periods of time.
For technical questions, please call 1-800-444-3353
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Parts List
Part # Description QTY
1 Infrared Sensor 1
2 Laser Pointer Beam 1
3 LCD Display 1
4 Laser Key 1
5 Celsius or Fahrenheit Select Key 1
6 Backlight Select Key 1
7 Measuring Key 1
8 Battery Compartment 1
9 Carrying Case (no shown) 1
Assembly Drawing
Part 1
Part 2
Part 3
Part 4
Part 5
Part 7
Part 6
Part 8
Note: No replacement parts available for this unit.
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS MANUAL
AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBUTOR MAKES ANY
REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO
MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS
OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY STATES THAT
ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED
TECHNICIANS AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING
OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO,
OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
NOTE: Some parts are listed and shown for illustration purposes only and are not available
individually as replacement parts.
For technical questions, please call 1-800-444-3353
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LIMITED 90 DAY WARRANTY
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality
and durability standards, and warrants to the original purchaser that this product is free from
defects in materials and workmanship for the period of 90 days from the date of purchase. This
warranty does not apply to damage due directly or indirectly, to misuse, abuse, negligence or
accidents, repairs or alterations outside our facilities, criminal activity, improper installation,
normal wear and tear, or to lack of maintenance. We shall in no event be liable for death,
injuries to persons or property, or for incidental, contingent, special or consequential damages
arising from the use of our product. Some states do not allow the exclusion or limitation of
incidental or consequential damages, so the above limitation of exclusion may not apply to
you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS
OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us with
transportation charges prepaid. Proof of purchase date and an explanation of the complaint
must accompany the merchandise. If our inspection veries the defect, we will either repair or
replace the product at our election or we may elect to refund the purchase price if we cannot
readily and quickly provide you with a replacement. We will return repaired products at our
expense, but if we determine there is no defect, or that the defect resulted from causes not
within the scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specic legal rights and you may also have other rights which
vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353
For technical questions, please call 1-800-444-3353
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