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The TC‑37M is a compact, lightweight, low‑power strain meter dedicated to full‑bridge measurements.
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A full‑bridge–only model joins the TC‑37 series.
The TC‑37M is a compact, lightweight, low‑power strain meter dedicated to full‑bridge measurements.
Despite its low cost, it achieves 1 microstrain (1 με) resolution and a measurement range up to ±30,000 microstrain (±30,000 με), with accuracy on par with our higher‑end models.
By focusing on essential functions, the TC‑37M delivers ultra‑low power consumption, enabling year‑long unattended logging on four AA alkaline batteries. A built‑in temperature sensor logs ambient temperature alongside strain data.
Onboard data memory and an interval timer support automatic measurements. Data can be retrieved via SD card or transferred to a PC for control and download. RS‑232C and USB interfaces are standard.
Water Level Measurement (GL Input Mode)
For water‑level applications, the TC‑37M offers a dedicated GL Input Mode. The instrument automatically selects appropriate display units and decimal places. By setting the initial depth from ground level (GL) to the water surface at the start of measurement, the system tracks fluctuations via a water level transducer and displays/records the current water level relative to ground level.
| Measurement Points | 1 |
|---|---|
| Compatible Transducer | Strain Gauge Transducer (4-Gauge Method) |
| Gauge Resistance | 120～1000Ω |
| Bridge Excitation | DC1V 120ms |
| Measurement Range | ±30,000 × 10⁻⁶ strain (including initial bridge offset) |
| Resolution | 1×10⁻⁶ strain |
| Measurement Speed | 200 ms/point (Monitoring), 200 ms/point (Scanning) |
| Measurement Mode | Initial / Direct / Major |
| Accuracy (23℃±5℃) |
±(0.08％rdg+2digit) |
| Temperature Coefficient | ±0.0045%rdg/℃ |
| Long-Term Drift | ±0.04% rdg/year |
Function
| Simple Major | Coefficient | 1 | |
|---|---|---|---|
| Unit | με | ||
| Decimal Point | 0 | ||
| Monitor | Display Mode | OFF, Value, Waveform (Y-T), Numeric / Max / Min | |
| Number of Display Channels | Numeric Display | 1 | |
| Waveform (Y-T) Display | 1 | ||
| Numeric / Max / Min Display | 1 | ||
| Measurement | Manual | Start Key Switch | |
| Automatic | Interval Timer | ||
| Interface | USB, RS-232C | ||
| Channel Settings | Coefficient | ±(0.00001～200000) | |
| Unit | 48 types, including με, mV, ℃, kgf, mm | ||
| Decimal Point | Can be set freely from 0 to 5 decimal places | ||
| Offset | Arbitrary values can be written | ||
| GL Input Function | Water Level Measurement Function GL–Water Surface Depth Offset |
||
| Temperature Measurement Function (Built-in Temperature Sensor) |
Measurement Range | -10～+50℃ | |
| Resolution | 0.1℃ | ||
| Accuracy | ±2℃ | ||
| Variation Check | Check Measurement Variation | ||
| Settings List Display | Initial Value | ||
| Auto Power-Off Function | Automatically turns off the power if no operation or interface command is received within a user-defined time. The Auto Power-Off function can be enabled or disabled. |
||
Interval Timer Function
| Function | Performs measurements at user-defined time intervals or at specified times | |
|---|---|---|
| Table Settings | Time Interval | Can be set in hours, minutes, and seconds up to 99h 59m 59s in step increments, or at 0.2-second intervals |
| Start at Real Time | Start time (day, hour, minute, second) can be set for each step | |
| Start Count | Maximum 99 times per step or unlimited | |
| Number of Steps | Up to 10 steps can be programmed | |
| GOTO Step | Allows looping back to a previous step in the program | |
| Sleep Function | Automatically turns the power ON/OFF when the interval is longer than 1 minute | |
Time Settings
| Settable Values | Year, Month, Day, Hour, Minute, Second |
|---|---|
| Accuracy | ±1 second per day (at 23℃±5℃) |
| Retention | Approximately 20 days (when fully charged) |
Display & Operation
| Display | Type | 3.0-inch semi-transmissive monochrome LCD with STN LED backlight |
|---|---|---|
| Resolution | 255 × 160 pixels | |
| Dead Pixels | 10 pixels or fewer (excluding aging effects) | |
| Operation / Controls | POWER key, Directional (Arrow) keys, ESC, ENT, 0–9, F1, F2, F3 | |
Storage Media
| Built-in Memory | Function | Record and playback of measurement data; storage of setting files |
|---|---|---|
| Recording Format | CSV format TDS format; data memory function (up to 100,000 data points) |
|
| Capacity | 512 MB | |
| SD Card | Function | Record and playback of measurement data; storage and copying of setting files |
| Physical Format | FAT32 | |
| Recording Format | CSV forma, TDS format |
|
| Capacity | 512 MB to 16 GB (manufacturer-specified) |
Interface
| USB | USB 2.0 compatible USB Type-C receptacle Supports general-purpose commands (various settings, measurement, data acquisition) |
|---|---|
| RS-232C | Compliant with RS-232C 9600, 19200, 38400, 57600, 115200 bps Supports general-purpose commands (various settings, measurement, data acquisition) |
Power supply
| Power supply | 4 × AA alkaline batteries Dedicated adapter (CR-1867) or external DC input DC Input Range: 9–18 V Can be powered via USB bus |
|---|---|
| Operating Time | Continuous Use: Approx. 24 hours Sleep Interval Measurement (1-hour interval): Approx. 1 year Conditions: Ambient temperature: 23℃ ±5℃ Strain measurement with 350 Ω bridge Using alkaline batteries |
Environmental Conditions
| Operating Temperature & Humidity Range | −10 to +50 ℃, up to 85 % RH (non-condensing) |
|---|
Other Specifications
| Dimensions | 102 (W) × 49 (H) × 202 (D) mm (excluding protrusions) |
|---|---|
| Weight | Approx. 750 g |
| Vibration Resistance | 29.4 m/s2 (50 Hz, 0.6 mm p-p) |
| Shock Resistance | 49 m/s2 |
| Drip Resistance | IP54 (with connector cap installed) |
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