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      bimetallic thermometers
      Product Model:WSS Series

      Summary

        The bimetallic thermometer is a on site measurement instrument suitable for measuring middle and high temperature, and can be used to measure directly the temperature of gasses and liquids. Compared with glass thermometer, it is featured with no mercury harmness, distinct reading, strong and durable and other advantages. Our company produces multipurpose bimetallic thermometers. The types and models are complete. The quality is high and reliable. It can be used widely in industry, agriculture, national defence and scientific research etc.

      Structure features and working principle

        Bimetallic thermometer (hereafter referred to as simply thermometer) is a coiling thermal bimetal temperature sensor. One end is fixed inside the protective sleeve (fixed end) and another end (free end) is connected at a fine axle. The axle end is equipped with a needle. When the temperature changes, the free end of the temperature sensor rotates, hereupon, the fine axle moves the needle. The dial plate indicates the temperature change. The steering drive mechanism in the straight meter moves the needle. The meter housing is made of steel plate, cast aluminium alloy and stainless steel. For the head of the adjustable angle thermometer, by means of corrugated pipe, angle machenism and other parts, the angle can be adjusted freely from the angle type to straight type, or from the straight type to angle type. The electric contact bimetallic thermometer is added with electrical contacts, adjusting devices, outlet box etc. When the temperature fluctuates, at the moment when the needle (moving contact) and the pre-established temperature control contact (upper limit or lower limit) are connected or disconnected, the relay or the contactor in the control circuit moves, thereby, realizing automatic temperature control or producing alarm

       
       
      WSS Series bimetallic thermometers   Main technical parameters
      ((1)Accuracy class: 1.5;
      (2) Time constant:Jacket pipe diameter d=6mm <30s;
      d=8、10、12mm <40s;
      (3) The nominal pressure of jacket pipe:
      6.4 MPa(Static pressure);
      (4)Jacket pipe material:1Cr18Ni9Ti.
       

       

      Table 1

      Type

      Model

      Dial plate nominal
      diameter(mm)

      Measuring
      range(℃)

      Value of
      division(℃)

      Insert length
      (mm)

      Jacket pipe
      diameter(mm)

      Installation
      thread(mm)

      Housing
      material

      Angle
      type

      WSS-301
      WSS-302

      60

      -80~+40
      -40~+80

      2

      75
      100
      150
      200
      250
      300
      Note:311,0~50℃,L=75 can't be made

      6

      Movable
      external
      thread
      M16×1.5
      Movable
      internal
      thread
      M16×1.5

      Steel plate

      WSS-301A
      WSS-302A

      0~50

      1

      Cast aluminum
      alloy

      0~100
      0~150

      2

      Straight
      type

      WSS-311A
      WSS-312A

      0~200
      0~300

      5

      Angle
      type

      WSS-401
      WSS-402

      100

      -80~+40
      -40~+80

      2

      75
      100
      150
      200
      250
      300
      400
      500
      750
      1000
      1250
      1500
      1750
      2000

      8
      10
      12

      Movable
      external
      thread
      M16×1.5
      Movable
      internal
      thread
      M16×1.5

      Steel plate

      WSS-401A
      WSS-402A

      Cast aluminum
      alloy

      Straight
      type

      WSS-411
      WSS-412

      Steel plate

      WSS-411A
      WSS-412A

      Cast aluminum
      alloy

      Angle
      type

      WSS-501
      WSS-502

      150

      0~50

      1

      Steel plate

      WSS-501A
      WSS-502A

      0~100
      0~150

      2

      Cast aluminum
      alloy

      Straight
      type

      WSS-511
      WSS-512

      0~200
      0~300

      5

      Steel plate

      WSS-511A
      WSS-512A

      Cast aluminum
      alloy

      Adjustable
      angle type

      WSS-463

      100

      0~400
      0~500

      10

      200
      250
      300
      400
      500

      6

      Fixed thread
      R1/2

      Stainless
      steel plate

      WSS-461
      WSS-462

      75
      100
      150
      200
      250
      300
      400
      500
      750
      1000
      1250
      1500
      1750
      2000

      10
      12

      Movable
      external
      thread
      M16×1.5
      Movable
      internal
      thread
      M16×1.5

      Stainless
      steel plate

      WSS-461A
      WSS-462A

      Cast
      aluminum
      alloy

      Note:
      A Jacket pipe material: 1Crl8Ni9Ti, if other material is required, that shall be noted.
      B Other installation thread required needs to be negotiated separately.
      C The flange standards and specifications shall be provided in the flanged connection.
      D The nominal diameter of the thermometer dial scale is Ф100. The insert length for Ф150 is:
      1) When the jacket diameter is Ф8, the insert length range is 75~500mm;
      2) When the jacket diameter is Ф10, the insert length range is 75~1000mm;
      3) When the jacket diameter isФ12,the insert length range is 1250~2000mm.
      E The requirement on other jacket diameters shall be negotiated separately.



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