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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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