# Extech 42512-NIST 30" Distance Dual Laser InfraRed Thermometer with NIST Traceable Calibration # Extech 42512-NIST 30" Distance Dual Laser InfraRed Thermometer with NIST Traceable Calibration ## Key Features At A Glance - Dual-laser targeting converges two beams into a 1-inch spot at the rated working distance for precise aim - Available in 12:1 (Model 42511, 12-inch convergence) or 30:1 (Model 42512, 30-inch convergence) distance-to-target ratios - Temperature range from -58 to 1100°F on the 42511 and -58 to 1832°F on the 42512 - Basic accuracy of ±(1% of reading + 2°F/1°C) with 0.1°F/°C maximum resolution - Adjustable emissivity from 0.10 to 1.00 for measurement across varied surface materials - Fast 0.15-second response time with Max hold display for capturing peak temperatures and hot spots - Adjustable High/Low set points with audible alarm when temperature exceeds programmed thresholds - White backlit dual LCD display, lock function for continuous readings, double-molded housing The Extech 42511 and 42512 are handheld non-contact infrared thermometers that use a dual-laser targeting system to indicate the exact spot being measured. The two laser points converge at the rated working distance to form a single 1-inch target spot, eliminating the guesswork that comes with single-point laser aiming on conventional IR thermometers. Both models are designed for quick temperature checks in industrial, electrical, automotive, and process environments where the user needs to scan multiple points rapidly or catch transient temperature spikes. The fast 0.15-second response time combined with the Max hold display function makes the instrument well suited for identifying hot spots across a row of components, electrical panels, mechanical assemblies, or process equipment without contacting the surface. ValueTronics International stocks test and measurement instruments at our 20,000 sq ft secure warehouse at 1675 Cambridge Drive, Elgin, Illinois. Equipment is received, inventoried, and prepared for shipment by our in-house team rather than drop-shipped from external sources, which lets us verify what we are sending and stand behind it with direct accountability. ## Brand Heritage Extech Instruments operates as a Teledyne FLIR brand. The Extech line was acquired by FLIR Systems in 2007 and became part of Teledyne Technologies when Teledyne acquired FLIR in 2021. The Extech brand continues as Teledyne FLIR's value-tier handheld test instrument line. ## Compare Other Models in This Series The Extech Dual Laser Infrared Thermometer family consists of two handheld non-contact temperature instruments differentiated by working distance, distance-to-target ratio, and upper temperature range. Both models share the same form factor, dual-laser convergence targeting concept, ±(1% of reading + 2°F/1°C) accuracy, 0.1°F/°C resolution, adjustable 0.10 to 1.00 emissivity, and identical physical dimensions and weight. The two-model line lets users select between a shorter 12-inch convergence model optimized for closer-in inspection work and a longer 30-inch convergence model with a tighter optical spot size for measurements taken from greater standoff distances. A third ordering option, the 42512-NIST, is the 30-inch model supplied with calibration documentation traceable to NIST. Each new model linked below is its own dedicated product page with condition-matched pricing. Select the page that matches both the model variant and the condition you need to see availability and current pricing. The primary differentiators across the family are laser convergence distance and upper temperature range. The 42511 converges its dual lasers at 12 inches with a 12:1 distance-to-target ratio and measures up to 1100°F. The 42512 converges at 30 inches with a 30:1 distance-to-target ratio and measures up to 1832°F, making it the appropriate choice when the user needs to measure from a greater distance, when the target is small relative to standoff distance, or when the application involves higher temperatures such as furnaces or exhaust systems. The 42512-NIST variant is functionally identical to the standard 42512 but ships with NIST-traceable calibration documentation. The comparison table that follows summarizes the per-model specifications side by side. Model Laser Convergence Distance Temperature Range Field of View **42512-NIST** 30" (76.2 cm) \-58 to 1832°F (-50 to 1000°C) 30:1 42511 12" (30.5 cm) \-58 to 1100°F (-50 to 600°C) 12:1 42512 30" (76.2 cm) \-58 to 1832°F (-50 to 1000°C) 30:1 Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below. ## Accessories Supplied - Pouch case - 9V battery - Calibration certificate traceable to NIST ## Product Core & Specifications Specifications 42511 42512 Laser Convergence Distance 12" (30.5cm) 30" (76.2cm) Range \-58 to 1100°F (-50 to 600°C) \-58 to 1832°F (-50 to 1000°C) Repeatability ±0.5% or 1.8°F/1°C ±0.5% or 1.8°F/1°C Basic Accuracy ±(1% of rdg + 2°F/1°C) ±(1% of rdg + 2°F/1°C) Max resolution 0.1°F/°C 0.1°F/°C Emissivity 0.10 to 1.00 Adjustable 0.10 to 1.00 Adjustable Field of View (Distance to Target) 12:1 30:1 Dimensions 5.7x4x1.6" (146x104x43mm) 5.7x4x1.6" (146x104x43mm) Weight 5.7oz (163g) 5.7oz (163g) **Important:** Two laser points converge at the rated working distance — 12 inches for the 42511 or 30 inches for the 42512 — to form the specified 1-inch target spot. Field of view is 12:1 (42511) or 30:1 (42512). **Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.** ## Details - **Price:** 434.0 USD - **Vendor:** Extech - **Type:** Data Log - **Tags:** Extech, Manufacturers, Meters & DAQ, product_manual_group_2, Product_new, Thermometer ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 434.00 USD | In stock | ## Images - Extech 42512-NIST 30" Distance Dual Laser InfraRed Thermometer with NIST Traceable Calibration --- > Source: [ValueTronics](https://valuetronics.com/products/42512-nist-extech-thermometer-new) > Updated: 2026-05-30