DeFelsko Positector IRT InfraRed Thermometer

Q: What is an infrared thermometer?

An infrared thermometer measures the thermal radiation emitted by an object without requiring contact.

Q: How is the PosiTector IRT different than the PosiTector DPM IR?

Unlike the PosiTector DPM IR, the PosiTector IRT measures surface temperature only. The PosiTector DPM family measures a number of climatic parameters including relative humidity, air temperature and surface temperature allowing it to calculate dew point temperature and the all-important difference between surface temperature and dew point temperature (Ts-Td) — a vital parameter for industrial painters. The PosiTector IRT has a larger distance to spot ratio and a button activated laser pointer for precise and accurate surface temperature measurement.

Q: What is distance to spot (D:S) ratio and why is it important?

The distance to spot ratio refers to the relationship between the diameter of the area being measured compared to the instrument’s distance from that area. As the distance (D) from the measured surface increases, the spot size (S) of the area being measured becomes larger. The D:S ratio of the PosiTector IRT is 5.7:1. For example, when the instrument is 85 cm (34 inches) from the surface, the spot size will be 15 cm (6 inches) in diameter. The temperature reported will be an average of the temperatures contained within the spot size. The greater the spot size, the more information will be gathered and averaged, giving you a better estimate of the area’s true temperature. A lower D:S ratio is advantageous when measuring large areas.

Q: What is emissivity?

Emissivity refers to a material’s ability to emit infrared energy, compared to an ideal black surface at the same temperature. The PosiTector IRT has built-in emissivity settings for certain materials as well as user-adjustable emissivity options. Select from a list of preset emissivity options, manually adjust the emissivity value or adjust to a known temperature. Most organic and painted surfaces have an emissivity of around 0.95. Shiny or reflective surfaces can be difficult to measure with an infrared thermometer, as they tend to reflect ambient infrared energy instead of emitting their own. To compensate for this, cover such surfaces with flat paint or a piece of electrical tape. Allow the paint or tape to acclimate to the surface’s temperature and take a measurement over the paint or tape.

Q: Are infrared surface temperature thermometers such as the PosiTector DPM IR and the PosiTector IRT suitable for measuring the temperature of blasted steel?

Yes, but adjusting the emissivity setting is critical. Depending on surface treatment, metals such as blasted steel can have a broad range of emissivity values. Adjusting to a known temperature (measured by a direct contact surface temperature probe) on a representative sample will assist in obtaining an accurate emissivity value. Some blasted surfaces can reflect nearby sources of infrared energy, impacting results. DeFelsko recommends situational testing be done to determine accuracy.

Q: What is measured with an infrared surface temperature probe and what are some typical applications?

An infrared surface temperature probe measures surface temperature from a distance without contacting the surface. An IR surface temperature thermometer is useful for measuring temperatures in areas where conventional sensors will not work including hard to reach areas and moving parts. Also ideal for measuring on objects whose temperature is above the recommended range for direct contact sensors or when contact with a sensor would damage the surface as is the case for freshly sprayed powder. The 5.7:1 distance to spot ratio of the PosiTector IRT will average the temperature over a larger area and is ideal for quickly scanning large steel structures.

DeFelsko Positector IRT InfraRed Thermometer

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DeFelsko Positector IRT InfraRed Thermometer

Button-activated laser pointer for accurate targeting

Surface temperature is constantly updated and displayed simultaneously

Solvent, acid, oil, water and dust resistant - weatherproof

Infrared Thermometer

Non-contact surface temperature measurement

Button-activated laser pointer for accurate targeting
Selectable emissivity values—choose from 7 preset material options, set a custom emissivity value, or adjust to a known temperature
Statistics Scan mode—continually displays/updates average, standard deviation, min/max surface temperature and number of readings while measuring one reading per second
Certificate of Calibration showing traceability to NIST included (Long Form)
5.7:1 distance to spot ratio—ideal for measuring large areas
Smart Trend indicators identify rising, falling or stable readings

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Kit Contents
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PosiTector IRT Infrared Thermometer
PosiTector IRT Probe PRBIRT
Protective rubber holster with belt clip
Wrist strap and protective lens shield
3 AAA alkaline batteries
PosiSoft Software and USB cable
Long Form Certificate of Calibration traceable to NIST
Convenient carrying case and instructions
Two (2) year warranty

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Features
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Simple

Surface temperature is constantly updated and displayed simultaneously
Button-activated laser pointer for simple, accurate targeting
NEW Larger 2.8" impact resistant color touchscreen with redesigned keypad for quick menu navigation
NEW On-gage help explains menu items at the touch of a button
RESET feature instantly restores factory settings

Durable

NEW Weatherproof, dustproof, and water-resistant—IP65-rated enclosure
NEW Ergonomic design with durable rubberized grip
Non-contact sensor won't get caught or worn
Shock-absorbing, protective rubber holster for added impact resistance
Two year warranty on gage body AND probe

Accurate

Certificate of Calibration showing traceability to NIST included (Long Form)
Fast response precision sensor provides accurate, repeatable readings
5.7:1 distance to spot ratio—ideal for measuring large areas
Smart Trend™ indicators identify rising, falling, or stable readings

Versatile

PosiTector body accepts all PosiTector IRT, DPM, 6000, 200, RTR, SPG, SST, SHD, and UTG probes easily converting from a infrared thermometer, to a dew point meter, coating thickness gage, surface profile gage, soluble salt tester, Shore hardness durometer or ultrasonic wall thickness gage
Selectable emissivity values - choose from 7 preset material options, set a custom emissivity value, or adjust to a known temperature
NEW Auto rotating display with Flip Lock

Powerful

Scanning Statistics Scan Mode—continually displays/updates average, standard deviation, min/max surface temperature, and number of readings while measuring one reading per second
NEW Screen Capture—save 100 screen images for record keeping and review
Pause function allows readings to be manually recorded
HiLo alarm audibly and visibly alerts when readings exceed user-specified limits
NEW Instant-on feature quickly powers up the gage if recently powered down
NEW Up to 30% longer battery life
USB Port for fast, simple connection to a PC and to supply continuous power. USB cable included
PosiSoft USB Drive—stored readings and graphs can be accessed using universal PC/Mac web browsers or file explorers. No software required.
Every stored measurement is date and time stamped
Software Updates via web keep your gage current
Includes PosiSoft suite of software for viewing, analyzing & reporting data

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Standard Models Features
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Includes ALL features as shown above plus:

NEW Storage of 1,000 readings per probe—stored readings can be viewed or downloaded

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Advanced Models Features
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Includes ALL features as shown above plus:

NEW Storage of 250,000 readings from multiple probes in up to 1,000 batches
Trend Charts graph readings in real-time
NEW Touchscreen keyboard for quickly renaming batches, adding notes, and more
WiFi technology wirelessly synchronizes with PosiSoft.net and downloads software updates
Bluetooth 4.0 Technology for data transfer to a mobile device running the PosiTector App or optional portable printer. BLE API available for integration into third-party software.
Integrate with third-party software, drones, ROVs, PLCs, and robotic devices using several industry-standard communication protocols
Store thickness, profile, environmental salt contamination, hardness, and wall thickness measurements in individual batches

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Models
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IRT1	IRT3	PRBIRT
Distance to Spot Ratio (D:S)	Distance to Spot Ratio (D:S)	Distance to Spot Ratio (D:S)
5.7:1	5.7:1	5.7:1
Temperature Range	Temperature Range	Temperature Range
-70° to 380° C -94° to 716° F	-70° to 380° C -94° to 716° F	-70° to 380° C -94° to 716° F

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Specifications
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Specifications	Range	Accuracy	Resolution
Temperature Range	-70° to 380° C-94° to 716° F	±1° C + 1%±1.8° F + 1%	0.1° C0.1° F

* At 23° C (73.4° F) ambient

Laser Pointer	Class 2 < 1mW
Distance to Spot Ratio (D:S)	5.7:1
Emissivity	Adjustable
Response Time	<500 µs (95% response)
Spectral Response	2 - 14 µm
Size*	127 x 66 x 25.4 mm (5" x 2.6" x 1")
Weigth*	137 g (4.9 oz.) without batteries

*Size and weight are for the PosiTector gage body only and do not include the probe.

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PosiSoft Suite of Software
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Four FREE and unique ways to view and report your PosiTector and PosiTest data. Learn More

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Downloads line

DeFelsko PosiTector IRT Advanced Infrared Thermometer - Data Sheet

DeFelsko PosiTector IRT Advanced Infrared Thermometer - Instruction Manual

DeFelsko Accessories for Inspection Instruments - Online Catalog

F.A.Q.

What is an infrared thermometer?

An infrared thermometer measures the thermal radiation emitted by an object without requiring contact.

How is the PosiTector IRT different than the PosiTector DPM IR?

Unlike the PosiTector DPM IR, the PosiTector IRT measures surface temperature only. The PosiTector DPM family measures a number of climatic parameters including relative humidity, air temperature and surface temperature allowing it to calculate dew point temperature and the all-important difference between surface temperature and dew point temperature (Ts-Td) — a vital parameter for industrial painters.

The PosiTector IRT has a larger distance to spot ratio and a button activated laser pointer for precise and accurate surface temperature measurement.

What is distance to spot (D:S) ratio and why is it important?

The distance to spot ratio refers to the relationship between the diameter of the area being measured compared to the instrument’s distance from that area. As the distance (D) from the measured surface increases, the spot size (S) of the area being measured becomes larger.

The D:S ratio of the PosiTector IRT is 5.7:1. For example, when the instrument is 85 cm (34 inches) from the surface, the spot size will be 15 cm (6 inches) in diameter. The temperature reported will be an average of the temperatures contained within the spot size. The greater the spot size, the more information will be gathered and averaged, giving you a better estimate of the area’s true temperature. A lower D:S ratio is advantageous when measuring large areas.

What is emissivity?

Emissivity refers to a material’s ability to emit infrared energy, compared to an ideal black surface at the same temperature. The PosiTector IRT has built-in emissivity settings for certain materials as well as user-adjustable emissivity options. Select from a list of preset emissivity options, manually adjust the emissivity value or adjust to a known temperature.

Most organic and painted surfaces have an emissivity of around 0.95. Shiny or reflective surfaces can be difficult to measure with an infrared thermometer, as they tend to reflect ambient infrared energy instead of emitting their own. To compensate for this, cover such surfaces with flat paint or a piece of electrical tape. Allow the paint or tape to acclimate to the surface’s temperature and take a measurement over the paint or tape.

Are infrared surface temperature thermometers such as the PosiTector DPM IR and the PosiTector IRT suitable for measuring the temperature of blasted steel?

Yes, but adjusting the emissivity setting is critical. Depending on surface treatment, metals such as blasted steel can have a broad range of emissivity values. Adjusting to a known temperature (measured by a direct contact surface temperature probe) on a representative sample will assist in obtaining an accurate emissivity value. Some blasted surfaces can reflect nearby sources of infrared energy, impacting results. DeFelsko recommends situational testing be done to determine accuracy.

What is measured with an infrared surface temperature probe and what are some typical applications?

An infrared surface temperature probe measures surface temperature from a distance without contacting the surface. An IR surface temperature thermometer is useful for measuring temperatures in areas where conventional sensors will not work including hard to reach areas and moving parts. Also ideal for measuring on objects whose temperature is above the recommended range for direct contact sensors or when contact with a sensor would damage the surface as is the case for freshly sprayed powder.

The 5.7:1 distance to spot ratio of the PosiTector IRT will average the temperature over a larger area and is ideal for quickly scanning large steel structures.

ADD TO CART THE ITEMS YOU WOULD LIKE TO PURCHASE
DeFelsko IRT1 Positector IRT Standard Infrared Thermometer View Model Details	$520.00
DeFelsko IRT3 Positector IRT Advanced Infrared Thermometer View Model Details	$970.00
DeFelsko PRBIRT Positector IRT Probe Only Infrared Thermometer View Model Details	$195.00
DeFelsko USBAC-G AC Power Adapter, 100-230V for use with the PosiTectors 6000, 200, SPG, RTR H, RTR 3D, DPM, IRT, SST, UTG, SHD, BHI for with serial numbers greater than 864000	$45.00
DeFelsko PRINTERBT Bluetooth Printer for use with PosiTector (Advanced Models): 6000, 200, SPG, RTR H, RTR 3D, DPM, IRT, SST, UTG, SHD, BHI, GLS	$335.00
DeFelsko PAPERBT 10 rolls of printer paper (Advanced models)	$20.00
DeFelsko BOOTGAGE-G Protective Rubber Holster for PosiTector gage bodies	$20.00
DeFelsko CASEINSP Plastic Inspection Case for use with the PosiTectors 6000, 200, SPG, RTR H, RTR 3D, DPM, IRT, SST, UTG, SHD, BHI	$50.00

ADD TO CART THE ITEMS YOU WOULD LIKE TO PURCHASE

Models

Price

DeFelsko IRT1 Positector IRT Standard Infrared Thermometer View Model Details

$520.00

DeFelsko IRT3 Positector IRT Advanced Infrared Thermometer View Model Details

$970.00

DeFelsko PRBIRT Positector IRT Probe Only Infrared Thermometer View Model Details

$195.00

Recommended Accessories

PRICE

DeFelsko USBAC-G AC Power Adapter, 100-230V for use with the PosiTectors 6000, 200, SPG, RTR H, RTR 3D, DPM, IRT, SST, UTG, SHD, BHI for with serial numbers greater than 864000

$45.00

DeFelsko PRINTERBT Bluetooth Printer for use with PosiTector (Advanced Models): 6000, 200, SPG, RTR H, RTR 3D, DPM, IRT, SST, UTG, SHD, BHI, GLS

$335.00

DeFelsko PAPERBT 10 rolls of printer paper (Advanced models)

$20.00

DeFelsko BOOTGAGE-G Protective Rubber Holster for PosiTector gage bodies

$20.00

DeFelsko CASEINSP Plastic Inspection Case for use with the PosiTectors 6000, 200, SPG, RTR H, RTR 3D, DPM, IRT, SST, UTG, SHD, BHI

$50.00

DeFelsko Positector IRT InfraRed Thermometer

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DeFelsko Positector IRT InfraRed Thermometer

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