The MTT MS3763 Slim Plug-In RTD Differential Temperature Transmitter measures the temperature difference between two Pt100 or JPt100 RTD sensors and converts that differential directly into an isolated, standard DC current or voltage output. This makes it a practical solution for monitoring temperature-rise applications such as heat exchanger inlet/outlet differences, cooling tower approach temperature, or bearing temperature deviation, where the difference between two points matters more than either absolute reading on its own.
Built-in burnout protection drives the output upscale if an RTD lead fails, giving operators an unmistakable signal that something needs attention rather than a misleadingly stable reading. Front-accessible trimmers allow zero and span to be adjusted on site, and dual isolated outputs let the differential reading be sent to two separate destinations from a single module. An optional fast-response configuration and an enhanced load-capability option are also available, letting the MS3763 be tailored to processes where response speed or driving a heavier output load matters most.
| Temperature Range | 0 to 50°C (fixed) |
| Differential Range | 0 to 20°C (fixed) |
| RTD Types | Pt 100Ω or JPt 100Ω (2-wire, JIS standard) |
| Excitation Current | Approx. 2mA |
| Lead Wire Resistance | 50Ω max per wire |
| Output Types | Single or dual isolated outputs; current 0-20mA or 4-20mA; voltage 0-10mV through ±10V DC |
| Output Load | 750Ω max (single 4-20mA); 550Ω/350Ω (dual) |
| Adjustment | Approx. ±5% of span, zero and span, via front trimmers |
| Accuracy | Better than ±0.2% of span (15-35°C ambient); ±0.2% of span per 10°C temperature effect |
| Response Time | 200ms max (0-90%); optional fast response 10ms max with /K option |
| CMRR | 100dB min. (500V AC, 50/60Hz) |
| Isolation | 4-way isolation between input, output, power, and ground; 100MΩ min. insulation resistance @500V DC; 2000V AC dielectric strength (input/output), 500V AC (output-to-output) |
| Power Supply | 100-240V AC, 24V DC, or 100-240V DC; 5.5-6.5VA (AC) / 1.5-1.8W (DC) |
| Dimensions | W29 x H86 x D125mm |
| Weight | 120g (main unit) / 80g (socket) max |
| Terminals | M3.5 screw terminals with drop-out prevention, 0.8-1.0 Nm torque |
| Mounting | Wall or DIN rail mount |
| Operating Conditions | -5 to 55°C, 5-90% RH non-condensing |
| Storage Temperature | -10 to 60°C |
| Additional Features | Burnout protection (upscale on wire failure); optional enhanced load capability (/L: 750Ω/550Ω outputs) |
Frequently Asked Questions
What is the MTT MS3763 used for?
It measures the temperature difference between two Pt100 or JPt100 RTD sensors and converts that differential directly into an isolated, standard DC current or voltage output. It’s a practical solution for monitoring temperature-rise applications such as heat exchanger inlet/outlet differences, cooling tower approach temperature, or bearing temperature deviation, where the difference between two points matters more than either absolute reading on its own.
What temperature and differential range does it cover?
A fixed 0 to 50°C absolute range with a 0 to 20°C differential range. If your application needs a wider span, let us know and we can check whether a custom-range unit is available.
What RTD sensor types are compatible?
2-wire Pt100Ω or JPt100Ω sensors to JIS standard, with a lead wire resistance limit of 50Ω max per wire. Confirm your existing RTD’s wiring and type before ordering to make sure it matches.
What protection does it have against a broken sensor?
Built-in burnout protection is included, so if an RTD lead opens or fails, the output drives to a defined state instead of giving a misleading mid-range reading.
How do I know if the MS3763 is right for my application?
If you need a reliable differential temperature reading between two RTD points feeding into a standard 4-20mA or voltage loop, the MS3763 is built for that. Send us your two RTD types, the expected differential range, and lead wire length, and we can confirm before you order.
Download MTT MS3763 Slim Plug-In RTD Differential Temperature Transmitter information here
Spec Sheet: MTT_SpecSheet1_MS3763_Rev260_E
Manual: MTT_Manual1_MS3763_Rev140_E
