Marmonix MIT 900 (MIT-900 / MIT900) Infrared Thermometer, −50 to 950 °C, 12:1
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Built for high-heat work, the Marmonix MIT 900 reads surfaces from −50 to 950 °C without contact. It has a 12:1 optic, laser aiming, 8–14 µm sensing, adjustable emissivity (0.10–1.00), MAX/MIN/AVG/DIF, alarms and 30 memories. Choose it for furnaces, kilns, metals and exhausts. Compare it with the MIT-700 and MIT 550e.
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Description
Marmonix MIT 900: a 950 °C infrared thermometer for hot industrial surfaces
Most handheld IR guns stop at 400–550 °C. The Marmonix MIT 900 (also listed as MIT-900 or MIT900) keeps reading up to 950 °C (1742 °F), which puts furnace shells, kiln walls, exhaust manifolds and molten-metal ladles within reach of a pocket instrument. It measures from a safe distance with a 12:1 optic and a laser dot, so you never have to touch a live busbar or a glowing surface to know its temperature.
It belongs to the Marmonix infrared and contact thermometer range, sitting at the top of the MIT line for high-heat work.
What is inside the MIT 900
A thermopile detector filtered to the 8–14 µm long-wave band collects the infrared energy a surface emits and converts it to a reading in 500 ms. Because shiny and dull materials radiate differently, the emissivity is adjustable from 0.10 to 1.00 (0.95 preset), letting you correct for oxidised steel, painted panels, refractory brick or rubber. On the backlit LCD the keypad steps through MAX, MIN, AVG and DIF, high and low alarms with a beeper, and 30 memory slots for logging a round of readings.
Technical data
| Parameter | MIT 900 value |
|---|---|
| Measuring range | −50 to 950 °C (−58 to 1742 °F) |
| Accuracy, 0 to 950 °C | ±1.5 °C (±2.7 °F) or ±1.5% of reading, whichever is greater |
| Accuracy, −50 to 0 °C | ±3 °C (±5 °F) |
| Display resolution | 0.1 °C / 0.1 °F |
| Repeatability | 1% of reading or 1 °C |
| Response time (95%) | 500 ms |
| Spectral band | 8–14 µm |
| Emissivity | 0.10–1.00 adjustable, 0.95 default |
| Distance-to-spot | 12:1 |
| Functions | MAX / MIN / AVG / DIF, high and low alarm, 30 memories, backlight, laser |
| Operating conditions | 0–40 °C; 10–95% RH non-condensing (up to 30 °C) |
| Storage temperature | −20 to 60 °C |
| Power and battery life | 9 V alkaline or NiCd; approx. 22 h without laser, 12 h with laser |
| Size and weight | 175 × 100 × 43 mm, 220 g |
Where MIT 900 users in the UAE and GCC put it to work
- Steel, aluminium and glass plants: spot-checking furnace casings, ladles, die temperatures and refractory hot spots up to 950 °C.
- Oil, gas and petrochemical sites: surveying flange insulation, steam traps, heat-exchanger shells and flare-line components during shutdown rounds.
- Power and substations: checking switchgear terminals, cable lugs and transformer bodies from a safe distance during summer peak load. For a full picture, pair it with a thermal imaging camera.
- HVAC and district cooling: verifying supply and return line temperatures and compressor discharge pipes in high ambient heat.
- Automotive and marine workshops: exhaust manifolds, turbochargers, catalytic converters, brake discs and engine-room equipment.
- Food production and catering: oven decks, griddles and fryer surfaces where contact probes are impractical.
How to take a reliable reading
- Fit the 9 V battery, power on and select °C or °F.
- Set emissivity for the surface: 0.95 for most painted, oxidised or organic surfaces, lower for bright metal. Taping or painting a matt patch on polished metal gives the best result.
- Mind the spot: at 12:1 the measured circle is about 1/12 of your distance, so at 60 cm it is roughly 5 cm. Make sure the target fills the spot.
- Pull the trigger and aim with the laser. To find a hot spot, start outside the area and sweep across it while watching MAX.
- Set the high alarm so repeat inspection rounds beep on any point above your limit, and store readings in the 30 memories.
- Remember an IR thermometer reads surfaces only. It cannot see through glass, steam or dust, and for air or liquid core temperature use a probe such as the MST-325 folding probe thermometer.
MIT 900 vs other Marmonix infrared thermometers
| Model | Range | D:S | Emissivity | Best for |
|---|---|---|---|---|
| MIT 900 | −50 to 950 °C | 12:1 | 0.10–1.00 adjustable | Furnaces, kilns, metals, exhausts |
| MIT-700 | −50 to 750 °C | 12:1 | 0.10–1.00 adjustable | Heavy maintenance below 750 °C |
| MIT 550e | −50 to 550 °C | 12:1 | 0.1–1.0 adjustable | General industrial and electrical checks |
| MIT-320 | −50 to 400 °C | 12:1 | 0.95 preset | HVAC and everyday surface checks |
Choose the MIT 900 when any target can exceed 750 °C. If your work stays below 550 °C, the MIT 550e covers it at a lower cost.
MIT 900 frequently asked questions
What is the maximum temperature of the Marmonix MIT 900?
It reads up to 950 °C (1742 °F), with ±1.5 °C or ±1.5% accuracy between 0 and 950 °C.
How far away can I measure with a 12:1 ratio?
Any distance works as long as the target is larger than the spot. The spot diameter is distance divided by 12, so a 10 cm target can be measured from about 1.2 m.
Why does polished stainless steel read too low?
Bright metal has low emissivity and reflects its surroundings. Lower the emissivity setting or place matt tape or paint on the surface and measure that.
Is MIT 900 the same as MIT-900 or MIT900?
Yes. All three names refer to this same Marmonix model.
Can it measure air or liquid temperature?
No. Infrared thermometers read surface temperature only. Use a contact probe thermometer for air, liquids or core temperature.
Where can I buy the MIT 900 in the UAE?
Order directly from Marmonix or through our authorised UAE distributor. Contact us for quotes, bulk orders and delivery across the GCC.
Related reading: Thermal imaging and industrial inspection guide · Electrical test and measurement guide
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