Marmonix MIT-320 Non-Contact IR Temperature Gun

The Marmonix MIT-320 is a compact non-contact infrared thermometer for HVAC, electrical, and industrial surface checks. It covers about −50 °C to +400 °C with a 12:1 distance-to-spot ratio, roughly 500 ms response, laser targeting, and 0.1° resolution so technicians can read hot or hard-to-reach surfaces without contact.

Browse Marmonix thermometers, or step up range with the MIT-700 infrared thermometer when you need higher temperature capability and adjustable emissivity.

MIT-320 infrared thermometer gun highlights

What the MIT-320 delivers for everyday non-contact checks:

• Temperature range about −50 °C to +400 °C (−58 °F to +752 °F)
• 12:1 distance-to-spot ratio for safer standoff readings
• Fast ~500 ms response with 0.1 °C / 0.1 °F resolution
• Laser targeting and clear LCD for quick aim-and-read work
• Preset emissivity ~0.95 for common industrial surfaces
• Powered by 2 × AAA batteries for pocket-friendly field use

Where teams use the MIT-320 IR gun

Typical MIT-320 use cases include:

• HVAC — supply/return registers, condensers, and motor housings
• Electrical maintenance — panel covers, terminations, and transformers (external surfaces only)
• Plant rounds — bearings, pumps, and process surfaces without shutdown
• Automotive & service — exhaust, engine, and brake-area spot checks

MIT-320 typical specifications

MIT-320 infrared thermometer questions

What temperature range does the MIT-320 cover?

The MIT-320 measures surface temperature from about −50 °C to +400 °C (−58 °F to +752 °F), which fits most HVAC and general industrial spot checks.

When should I choose the MIT-320 instead of the MIT-700?

Choose the MIT-320 for compact everyday −50 to 400 °C work with a 12:1 spot ratio; pick the MIT-700 when you need a higher upper range (to about 750 °C) and adjustable emissivity.

Is the MIT-320 suitable for electrical panel spot checks?

Yes for external surface temperature screening at a safe distance — use PPE and lockout rules; it is not a substitute for contact probes or thermal imagers on energized work.

Related: Thermometers · MIT-700