The document describes the features and characteristics of Extech Instruments Corporation's products, including built-in non-contact IR thermometer with laser, low current capability, audible and visual input alerts, easy-to-read backlit display, MAX Hold and RELATIVE function, 8:1 distance to target ratio, and convenience.
The Extech 400 Series combines a rugged True RMS multimeter with a non‑contact infrared thermometer and laser pointer. Models 450 and 470 include the IR thermometer, while all models provide audible and visual alerts, backlit displays, and low‑current measurement capability down to 0.1 µA.
The package includes CAT‑III test leads, a multi‑position tilt stand, a velcro‑strip holster, a bead‑wire temperature probe (‑58 °F to 482 °F) for most models, and a 9 V battery. Warranty varies by model: One Year for the 410 and Three Years for the other models.
| Display resolution | 2000 Counts Backlit |
|---|---|
| Measurement type | True RMS |
| DC Voltage range | 0.1 mV to 1000 V |
| DC Current range | 0.1 µA to 20 A |
| IR Temperature range | -4 to 1382 °F (-20 to 750 °C) |
| Distance‑to‑target ratio | 8:1 |
| Emissivity | 0.95 (fixed) |
| Warranty | One Year (Model 410) / Three Years (others) |
The IR thermometer has an 8:1 distance‑to‑target ratio.
It measures from –4 °F to 1382 °F (–20 °C to 750 °C).