The MTT MS3768 Slim Plug-In Programmable Linearizer takes a non-linear DC current or voltage input and converts it into a linearized, isolated output that tracks the true process variable rather than the raw sensor characteristic. Many field sensors, such as tank level probes on irregularly shaped vessels or flow elements with a non-linear output curve, do not produce a signal that scales evenly with the quantity being measured — the MS3768 corrects for that curve so downstream instrumentation reads a properly linearized value.
Configuration is done through a PC connected via RS-232C, where up to 21 breakpoints can be programmed to approximate the input’s characteristic curve using linear interpolation between segments. This makes the MS3768 adaptable to a wide range of non-linear sensor types without needing a custom-built conditioner for each one. Front-panel LED indicators show run and fault status at a glance, and galvanic isolation between input, output, and power protects the linearized signal from noise and ground loops.
| Input Range | 2mA to 60V DC (multiple selectable codes: A-F current, 1-5 voltage) |
| Input Resistance | 1MΩ min. (voltage); 10Ω (current) |
| Max Input | 120V DC continuous (voltage); 100mA DC continuous (current) |
| Input Accuracy | (2 x Range / Span) x 0.02% |
| Output | Single: 4-20mA (750Ω load), 0-10V, 0-5V, or 1-5V; Dual: current/voltage combinations |
| Output Load | 2mA max (voltage); 750Ω / 550Ω / 350Ω (current, single/dual) |
| Output Accuracy | 0.04% |
| Output Range | -10% to 110% |
| Adjustment | ±4% of span, zero and span |
| Linearization | Up to 21 configurable breakpoints with linear interpolation between segments; configured via RS-232C from a PC |
| Response Time | 260ms max (0-90%, step input at 100%) |
| Temperature Effect | 100ppm/°C max |
| CMRR | 100dB min. |
| Isolation | Between input, outputs, power, and ground; 100MΩ min. insulation resistance @500V DC; 2000V AC dielectric strength (input/RS-232C to outputs, 1 minute), 2000V AC power/ground (5mA cutoff), 500V AC output-to-output (1 minute) |
| Power Supply | 100-240V AC (50-60Hz), 24V DC ±10%, or 100-240V DC; 5.0VA max (single) / 1.6W max (dual, 24V DC) |
| Dimensions | W29 x H86 x D125mm |
| Weight | 120g (main unit) / 80g (socket) |
| Terminals | M3.5 screw terminal, 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 | Status LEDs (blue RUN, red FAIL); RS-232C configuration interface |
Frequently Asked Questions
What is the MTT MS3768 used for?
It takes a non-linear DC current or voltage input and converts it into a linearized, isolated output that tracks the true process variable rather than the raw sensor characteristic. Many field sensors, such as tank level probes on irregularly shaped vessels or flow elements with a non-linear output curve, don’t produce a signal that scales evenly with the quantity being measured, and the MS3768 corrects for that curve.
How is the linearization configured?
Configuration is done through a PC connected via RS-232C, where up to 21 configurable breakpoints can be set to map the input curve to a linear output. This gives a close match to almost any non-linear sensor characteristic, such as a dip-shaped tank profile or a flow element’s square-root curve.
What input and output signal types does it accept?
Input covers a wide range from 2mA to 60V DC across selectable current and voltage codes. Output is available as a single 4-20mA, 0-10V, 0-5V, or 1-5V signal, or dual current/voltage combinations. Tell us your sensor’s raw signal type and range and we can confirm the setup.
Can I fine-tune the output after the linearization is programmed?
Yes, ±4% of span zero and span adjustment is available on top of the programmed breakpoint curve, so the output can be trimmed to match the receiving instrument exactly on site.
How do I know if the MS3768 is right for my application?
If your sensor’s output doesn’t scale evenly with the actual process value, an irregular tank shape or a non-linear flow element, the MS3768’s programmable breakpoints correct that curve before the signal reaches your control system. Send us the sensor’s raw output characteristic (a table or curve, if available) and we can confirm before you order.
Download MTT MS3768 Slim Plug-In Programmable Linearizer information here
Spec Sheet: MTT_SpecSheet1_MS3768_Rev260_E
Manual: MTT_Manual1_MS3768_Rev160_E
