Bimetal Thermometer

Bimetal thermometer for robust, mechanical temperature indication in industrial, HVAC and process-control applications.

Product Application

Bimetal thermometer is a kind of on-site detection instrument for measuring low and medium temperatures, which can directly measure the temperature of liquid, steam and gas media in the range of -80°C~+500°C in various production processes.

Product Principle

Bimetal thermometers are based on a bimetal sheet wound into a circular bend. When one end is expanded by heat, the pointer rotates and the working instrument displays the temperature value corresponding to the thermopotential.

Product Features

  • On-site display of temperature, intuitive and convenient;
  • With automatic power cut off and alarm function;
  • Safe and reliable, long service life.
  • A variety of structural forms, can meet different requirements.

Product Category

  • Bimetal thermometer-ordinary type, dial pointer indicates the temperature on the spot;
  • Electric contact bimetal thermometer: in addition to field indication of temperature, through the upper and lower given contacts, when the temperature reaches the given value, contact closure or disconnection to make the control circuit in the relay action, so as to automatically control and alarm;
  • With thermocouple (resistance) integrated bimetallic thermometer, armored thermocouple (resistance) installed in the bimetallic thermometer protection tube, not only to meet the requirements of field Temperature measurement requirements, but also to meet the requirements of long-distance transmission;
  • Explosion-proof bimetal thermometer: Used in the production site there are hydrocarbons and other explosive gases when the electric contact type bimetal thermometer, measuring its various processes (-80 ~ +500) range of liquid, gas medium or solid surface temperature. In addition to realizing the characteristics of the electric contact type itself, it also meets the requirements of explosion-proof.

Product Parameters

1. Executive Standard of the Product

  • JB/T8803

2. Nominal diameter of standard disk

  • 60
  • 100
  • 150

3. Accuracy level

  • Bimetal Thermometer:
    • Level 1.0
    • Level 1.5
  • Armored Thermocouple (Pt100):
    • Level A
    • Level B

4. Thermal Response Time (t0.5)

Protection tube diameter (mm)Thermal response time (s)
Ф6*0.5≤40
Ф8*1≤40
Ф10*1≤40
Ф12*1.5≤60
Ф14*1.5≤90

5. Protection level:

  • IP55
  • IP65
  • Ip66

6. Angle adjustment error:

the angle adjustment error should not exceed 1.0% of its range.

7. Return error:

the return error of the thermometer should not be greater than the absolute value of the basic error limit.

8. Repeatability:

thermometer repeatability limit range cut should not be greater than 1/2 of the absolute value of the basic error limit.

9. Temperature measurement range

Temperature measurement rangeAccuracy
-80~40, -50~300, -50~200, -50~150, -50~100, -50~50, -40~80, -40~60, -30~150, -20~200, -20~150, -20~100, -20~80, -20~60, 0~50, 0~60, 0~80, 0~100, 0~120, 0~150, 0~200, 0~250,0~300, 0~350, 0~400, 0~500, 0~6001.0, 1.5, 2.0

10. Normal atmospheric operating conditions

WorkplaceProtection tube diameterProtection tube diameter
Shelter-25~+255~100
Outdoor places-40~+855~100

11. Form of measuring end

  1. Integrated
  2. Core pulling type

12. Electrical parameters and wiring of the electrical contact type

  • Electrical parameters
    • Rated power: 10VA
    • Working voltage: 220/380V.A.C
    • Maximum allowable current: 0.7A
  • Wiring method

  1. Blue, 2, Common
  2. Red, 1, Upper limit, High Alarm
  3. Yellow, 3, Lower limit, Low Alarm

Model Naming Method

W
Temperature Instruments
S
Metal expansion type
S
Temperature sensing element bimetal
Electrical contact structure
XX
-none
Remote structure
PP
-none
Nominal diameter of case
360
4100
5150
Location characteristics
0Axial
1Radial
2135° orientation
8Universal
Fixed installation
0No fixed installation
1Movable external thread
2Movable internal thread
3Fixed thread
4Fixed flange
5Ferrule thread
6Ferrule flange
Sleeve form
-see attachment
WSSXP300-
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Standard size

FormACELd
Axial typeФ6573Prior selection M20*1.5, E= 15 M27*2, E=2075, 100, 150, 200, 300 400, 500, 750, 1000Ф6, Ф8, Ф10
Ф10573
Ф15573
Radial typeФ65110
Ф105110
Ф155110
135° orientationФ10585
Ф15585
Universal typeФ105178
Ф155178
Remote transmission typeФ105200
Electric contact typeФ105200

Structure diagram

  1. WSS-401
  2. WSS-411
  3. WSS-421
  4. WSS-481
  5. WSSP-481 (Remote transmission)
  6. WSSX-481

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