T-ZACCS3 Full-Bridge Dedicated
Measurement Instrument TC-37M

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.

[GL Input Mode Screen]

• Specifications

  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

   

• Specifications(details)

  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)