

Extech 42570 Dual Laser InfraRed Thermometer
The Extech 42570 Dual Laser InfraRed Thermometer is a high-end, professional-grade non-contact temperature measuring tool built for demanding industrial applications. It features a 50:1 distance-to-target ratio, dual lasers for pinpoint targeting, a wide temperature range, Type K thermocouple input, and USB connectivity for data logging and advanced analysis.
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Description
This instrument is engineered for use in environments where high temperatures and accurate targeting matter. With a dual-laser aiming system, it shows the exact measurement spot by converging two laser points into a roughly 1 inch diameter spot when at the correct distance (around 50″ / 127 cm). This ensures you’re measuring the right area even at a distance. The 50:1 optics allow you to safely measure small targets from far away — useful in hard-to-reach or hazardous areas. The infrared measurement range extends from approximately –58 °F to 3992 °F (–50 °C to 2200 °C), and the integrated Type K thermocouple input adds contact measurement capability from –58 °F to 2498 °F (–50 °C to 1370 °C). The instrument supports adjustable emissivity (0.10 to 1.00) for accurate readings on different surface materials, offers a fast 100 ms response time, and provides functions such as MAX, MIN, AVG and DIF to help analyze temperature trends or identify hot spots. A backlit multifunction LCD with bar-graph gives clear visual feedback, and high/low alarm set-points with audible alerts enable proactive monitoring. The unit also connects via USB for data transfer and includes software, a tripod mount for hands-free use, a carrying case, probe, and battery — all tailored for industrial inspections, motor/equipment monitoring, furnace checks, and power-generation contexts where precision matters.
Features
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Extensive IR temperature range from about –58 °F to 3992 °F (–50 °C to 2200 °C).
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Type K thermocouple input supporting contact measurement from approx. –58 °F to 2498 °F (–50 °C to 1370 °C).
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High 50:1 distance-to-target (D:S) ratio, allowing measurement of small surface areas from greater distances.
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Dual laser targeting system where two laser points converge to define the exact measurement spot (~1″ / 2.5 cm) at the correct distance.
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Adjustable emissivity (≈0.10 to 1.00) for improved accuracy on different materials and coatings.
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Fast response time (~100 milliseconds) to quickly capture temperature spikes or changing conditions.
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Display features include a white backlit multifunction LCD, bar-graph display, and modes such as MAX, MIN, AVG and DIF for trend analysis.
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High/low alarm settings (visual + audible) for automatic alerting when a reading is outside preset limits.
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USB interface with included software for data logging, analysis, and PC connectivity.
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Complete kit and rugged design, including Type K probe, tripod mount, carrying case, 9-V battery, and durable double-moulded housing for industrial field use.
Includes
- Type K temperature probe
- USB cable
- Software,
- Carrying case
- 9-volt battery







