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WSPF-THS - Thermocouple Converter

This compact plug-in converter accepts Thermocouples signal input conforming to JIS standard and provides optically isolated DC voltage or current output.
This converter has a linearizer, a cold junction compensation circuit, and a burnout protection circuit as standard equipment which is required to measure temperature.


  • Fine Zero & span adjustment by 15 turn trimmer
  • Zero & span adjustment ±10% full scale
  • Safe design by dielectric strength of 3000Vac
  • 5 years warranty, long life
  • CE approved
  • Linearizer, Cold junction compensation circuit, and Burnout protection circuit built-in

Common Specifications

Accuracy : ±0.2% FS (at 23±10°C)
Response time : Approx. 25ms (0 to 90%)
Allowable load : Current output
    15V or less of voltage drop
  Voltage output
    Load current 5mA or less
      *1μA or less if the output is less than 1V FS
Zero & Span adjustment : ±10% FS (15 turn trimmer)
Operating temperature : -5 to +55°C
Storage temperature range : -10 to +60°C
Operating relative humidity : 90% or less (Non-condensing)
Temperature coefficient : ±0.015% FS of span per °C
Cold junction compensation
: ±0.5°C or less at 23±10°C (±1°C or less for R, WR and S)
Cold junction compensation
: 10 to 40°C
  *R, S, WR thermocouple : ±1°C
Linearization : Available (30% FS or less of R and W is out of range)
Burnout protection : Upscale (less than 1.5sec) *Please contact us for downscale
Isolation : Between input, output, and power supply
Insulation Resistance : 100MΩ or more with 500Vdc megger
  Between input, output, and power supply terminal
Dielectric Strength : 3000Vac for 1 minute between power supply and
  input/output terminal,
  2000Vac for 1 minute between input and output terminal
Power Consumption : Approx. 4.4VA (AC), Approx. 63mA (DC)
Power supply variation : ±0.1% FS (within the range of rated voltage)
Dimensions : 84(H) X 23(W) X 106.5(D)mm
Weight : Approx. 130g
Structure : Plug-in (Body part and socket part)
Connection : M3 SEMS screw part of the base socket (Tightening torque 0.6N·m)
Mounting : DIN rail or wall surface
Case color and material : Ivory, ABS resin, flame retardant grade UL94V-0
EMC directive : EN61326-1, EN61010-1, EN50581
  Installation category : II, Pollution degree : 2
Rated altitude : 2000m or less

Download Data Sheet
Download Data Sheet