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IR / Infrared Thermometer, -20°C to +510°C, 1 %

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Manufacturer Part No:
Order Code:
Also Known As:
GTIN UPC EAN: 793950025093
Technical Datasheet:
42509   Datasheet
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-20°C to +510°C





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Technical Docs (1)

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CAD Models and drawings are provided to you on a revocable limited licence for your internal use only but remain the property of the manufacturer who retain all intellectual property rights and ownership. They are provided to assist you in decision making and as design guide but are not guaranteed to be error free, accurate or up to date and is not intended to be taken as advice.
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Product Overview

The 42509 from Extech Instruments is a dual laser IR thermometer with colour alert feature. The meter has dual lasers for quick accuracy in target area and programmable high/low alarms. Adjustable emissivity from 0.10 to 1.00 increases measurement accuracy for different surfaces. It features adjustable high/low set points with audible alarm alerts user when temperature exceeds the programmed set points. The 42509 is one of the fastest and most accurate IR thermometers with dual lasers identifying distance and location where accuracy is highest. This infrared thermometer measures and displays non-contact temperature readings from -4 to 950°F (-20°C) to 510°C). Dual laser pointers ensure accurate targeting and temperature measurement. The colour alert feature indicates when high or low set points are exceeded. Proper use and care of this meter will provide years of reliable service. It has ±0.5% or 1.8°F/1°C repeatability, ±(1% of rdg + 1°C) basic accuracy & 0.1°F/°C maximum resoluti
  • High/low alarms with vision alarm function, 8µm to 14µm IR spectral response (wavelength)
  • Fast and accurate measurements at 12" where the two lasers converge with 12:1 field of view
  • Great for processes that require temperature control and monitoring
  • Red backlit display flashes when reading exceeds high or low set points
  • Exclusive 150ms instantaneous response for capturing spikes in temperature
  • Automatic blue backlit dual LCD display, max mode captures and holds rapidly changing temperatures
  • Adjustable emissivity increases measurement accuracy for different surfaces
  • Double moulded housing, automatic power off (7sec with LOCK to disable), CE certified
  • Operating temperature range from 0°C to 50°C, 12:1 field of view (distance to target)
  • Dimension is 5.7inch x 4inch x1.7inch (146mm x 104mm x 43mm) and weight is 163g


Test & Measurement


42509 IR thermometer, Case, 9V battery.


Do not point the beam toward anyone's eye or allow beam to strike the eye from a reflective surface.


Use extreme caution when the laser pointer is on.

Also Known As

GTIN UPC EAN: 793950025093

No Longer Manufactured


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