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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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