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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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