Test & EE Gear ThermalMultimeters

FNIRSI HRM-10 IR Thermometer

Sonic 1 min read Jul 2026

Would I buy it again?

Would buy again

Owned 2 months · first impressions

Where to get it

View on AliExpress

Paid $33.90 · May 2026
Seen as low as $29.50
Bought via AliExpress

Pros & cons

Agrees with my oven and my kettle. Emissivity setting is buried three menus deep.

What's good

Agrees with my oven's set point and a boiling kettle within a couple of degrees
12:1 D:S ratio is genuinely useful at a distance

What's not

Emissivity adjustment is buried three menus deep
No backlight timeout — drains batteries if left on

Specs

As listed by the seller, corrected where I measured something different.

Range: -50°C to 550°C
D:S ratio: 12:1
Emissivity: Adjustable 0.1–1.0
Display: Backlit LCD

What's in the box

IR thermometer
2x AAA batteries
No case

Checked it against a boiling kettle (100°C at altitude) and my oven’s own probe, and it landed within a couple of degrees both times. The 12:1 distance-to-spot ratio is a real advantage over the cheaper single-digit-ratio guns. My only real complaint is the emissivity setting, which is buried three menus deep — fine once you find it, annoying every time you have to.