Klein Tools IR10 Dual-Laser Infrared Thermometer, 20:1

Yes, and that is the reason to pick it over an IR-only gun. Infrared reads surface temperature only, but the IR10 accepts a standard K-Type thermocouple probe for bulk temperatures of air, gas or liquid, and a K-Type probe is included. That covers HVAC supply and return air readings where a surface shot would just give you duct skin temperature. Range is the same either way, -40 to 1200 F (-40 to 650 C).

No. The IR10 is not a medical device and Klein states it is not intended for use on people or animals. It is a surface and bulk temperature tool for equipment, ducts, panels and piping. If you need body temperature screening, buy a purpose-built clinical thermometer instead.

Not at a fixed emissivity setting, which is why the IR10 has adjustable emissivity from 0.1 to 1.0. Polished or bare metal reflects rather than emits, so left at a default painted-surface value the reading comes in low. Dial the emissivity down for bright metal, or do what most electricians do and shoot a piece of matte tape or a marked spot on the conductor instead. For painted panel covers, insulation and duct board, the high end of the range works as-is.

You can set high and low limits yourself, and when a reading breaches them the IR10 gives an audible beep and a visual indication at the same time. That is what makes it usable for scanning a row of breakers, bearings or registers one after another, since you are not reading numbers off the screen on every shot. It also logs max, min, average and difference across a measurement event, so you can sweep an area and then check the spread.

It is rated IP54 for dust and water resistance and the soft-touch overmolded housing is built to take a 3 m (9.9 foot) drop. IP54 means protection against dust ingress and splashing water, not immersion, so rain and crawlspace grit are fine but do not submerge it. It weighs 0.463 lbs and ships with a custom pouch.

One 9-volt alkaline battery, and one is included in the box. Klein rates battery life at about 8 hours of continuous use with both the laser and the backlight on, so turning the backlight off stretches it. Auto power-off shuts the meter down when you set it aside.

Response time is under 150 ms and the display resolves to 0.1 degrees, so you can move from breaker to breaker or register to register without waiting for the number to settle. Readings switch between Fahrenheit and Celsius, and the backlit digital display stays readable in a dark mechanical room or attic.

They are Class 2 lasers. Do not stare into the beam and never point it at anyone's eyes. In practice that means aiming at equipment only and being careful with reflective surfaces like bare metal panel covers or glass, which can bounce the beam back. The two lasers are there to mark the edges of the spot you are reading, not to illuminate the target.

Overall it measures 7 inches long, 4.49 inches high and 2.05 inches wide, at 0.463 lbs. That is a standard pistol-grip IR gun footprint, so it sits in a tool bag or on a truck shelf rather than in a shirt pocket. It comes with its own pouch, and the housing is plastic with a soft-touch overmold.