Raytek Marathon MM Fixed IR Pyrometer

Name: Raytek Marathon MM Fixed IR Pyrometer – Brochure & Quote
Brand: Raytek
SKU: Marathon MM

A networkable fixed pyrometer with through-the-lens sighting and video option

The Raytek Marathon MM series is a compact fixed-mount infrared pyrometer for industrial heating, forming and metal processing, covering -40 to 2250 degC. The through-the-lens sight, optional variable focus and optional video head make it suitable for aiming at small or distant targets, and the RS485 output lets up to 32 sensors share one network.

The LT, G7, G5, MT and 3M models differ in spectral response. Choose by material and temperature, not by temperature alone.

Technical specifications

Parameter	Specification
Series	Marathon MM: LT, G7, G5L, G5H, MT and 3M models
Temperature ranges	LT: -40 to 800 degC; G7: 300 to 900 degC; G5L: 250 to 1650 degC; G5H: 450 to 2250 degC; MT: 250 to 1100 degC; 3M: 100 to 600 degC
Spectral response	LT 8 to 14 um; G7 7.9 um; G5 5 um; MT 3.9 um; 3M 2.1 to 2.5 um
System accuracy	LT: +/-1 % or +/-1 degC (Tmeas above 0 degC); G5L, G5H, G7: +/-1 % of reading; MT: +/-1 % above 350 degC, +/-2 degC or 2 % below; 3M: +/-1 % above 150 degC, +/-5 degC below
Repeatability	+/-0.5 % of reading or +/-0.5 degC
Response time (95 %)	LT, MT, G7: 120 ms; G5: 60 ms; 3M: 20 ms
Optical resolution	70:1 for LT, MT, G5, 3M; 100:1 for G7; spot sizes down to 1.1 mm
Focus	Variable focus 0.2 to 2.2 m (0.7 to 72 ft) with VF1 option
Emissivity	0.100 to 1.150 in 0.001 steps
Outputs	0/4 to 20 mA; relay 48 V, 300 mA, under 2 ms; RS485 two- or four-wire networkable to 32 sensors; analog video (NTSC, 510 x 492, FOV 8 degrees) on video models
Inputs	Emissivity setting, background radiation compensation, trigger, laser on/off (software enabled)
Power supply	24 VDC +/-20 %, 500 mA
Ambient temperature	5 to 65 degC without cooling (video 50 degC); 10 to 120 degC air cooled; 10 to 175 degC water cooled; 10 to 315 degC with ThermoJacket
Enclosure / weight	IP65 (IEC 529), NEMA 4; 700 g (25 oz)
Options	Laser (…L) or video (…V) sighting; VF1 variable focus; water-cooled housing with air purge collar (…W); calibration certificate (XXXMMCERT)
Software	DataTemp Multidrop for remote configuration and monitoring

Sighting, accessories and installation

Aiming uses a through-the-lens visual sight with either a laser or a video camera. Video models give a live picture for real-time monitoring and recording. The standard scope includes a stainless steel mounting nut, a fixed bracket, the operator manual and DataTemp Multidrop software.

The manufacturer lists a stainless steel sight tube to 800 degC and a ceramic sight tube to 1500 degC, a pipe thread adapter, a protective window, USB/RS485 converter, industrial power supply, terminal blocks, adjustable bracket, high- and low-temperature cables and a ThermoJacket enclosure for ambient temperatures up to 315 degC. Order options must be specified at the time of order.

Selection notes and what to confirm

Match the spectral response and range in the table to the target material: LT covers -40 to 800 degC, MT 250 to 1100 degC, G5H reaches 2250 degC and 3M offers the fastest response at 20 ms. Confirm the model code, laser or video sighting, variable focus, cooling, network address plan and accessories. Ambient temperature at the mounting position and the spot size needed at working distance both decide whether cooling or a different optic is required. For simpler fixed measurements see the Raytek Compact CI, or browse temperature instrumentation.

Documents and quotation

The attached Marathon MM brochure (2 pages, covering the LT, G7, G5, MT and 3M models) contains the measurement, electrical and optical specifications and the options list. The operator manual link on the manufacturer page is not currently available.

Seven Star LLC is an independent supplier in Muscat. Send the model code, sighting, cooling and quantity for a quotation.

Raytek pyrometer families

The manufacturer's current range keeps the Raytek name on the Compact CI and CM sensors, the Compact MI3 with its multi-sensor design, the Marathon MM with high-resolution optics, and the handheld Raynger 3i Plus. The Compact CI and CM are described as rugged, easy to install units for OEM and end-user applications. The Thermalert 4.0 and Endurance series cover wider spectral and temperature needs.

Ordering Raytek sensors: what we need

Send the full model code from the sensor label, since it fixes the temperature range, the output type and the cable length. For a new measuring point, give the target material and surface, the temperature span, the distance and target size, and the ambient temperature at the sensor. Mention accessories such as air purge collars or mounting brackets. GCC inquiries are welcome.