Bi-metal pointer thermometer

Bimetal pointer thermometer measures by thermal expansion. A bimetal thermometer uses a bi-metal spring as the temperature sensing element. This technology uses a coil spring made of two different types of metals that are welded or fastened together.

What is a Bi-metal Pointer Thermometer?

These metals could include copper, steel, or brass. One must have low heat sensitivity while the other metal has high heat sensitivity. Whenever the welded strip is heated, the two metals change length based on their rates of thermal expansion. Since the two metals expand to different lengths, the bimetallic strip is forced to bend or curl towards the side with a lower coefficient of thermal expansion. The movement of the strip is used to deflect a pointer over a calibrated scale which then indicates temperature to the user. Their construction is simple, yet rugged. They are suitable for most applications and measure a range from -50°C to 600°C. They come with multiple entry combinations and provide high repeatability with an accuracy ± 1% FSD.

• The advantage of bimetal temperature gauges is its relatively low cost and robust design.
• The disadvantage of bimetal temperature gauges compared to electrical temperature devices is that you must be physically present at the point of measurement to take the reading.

Bimetal gauges/thermometers are used in a variety of industries in their process control such as chemical, oil and gas, refining, pulp and paper, power, and energy and water-wastewater industries and machine building.

Bimetal pointer thermometer standard

Type 01 Bimetal thermometer, case steel, connection back

This bimetal thermometer is a solid-constructed temperature-measuring instrument for heating and sanitary industry.

Model Range: 01

• Bimetal thermometer
• for heating and sanitary applications
• Accuracy 2
• Case steel galvanized
• with slip ring
• Connection back

Nominal sizes available

• NS 63 / 80 / 100 / 160

Measuring ranges

• from -30/+50 °C up to 0-250 °C
• other measuring ranges / higher temperatures on request

Connection

• Removable thermowell in brass
• Diameter 11 mm
• G 1/2 A with lateral screw

Nominal length immersion tube

• 45, 63, 100 (full material)
• 160, 200 up to 400 (consisting in several parts, solded)

Type 02 Bimetal thermometer, case steel, connection bottom

This bimetal thermometer is a solid-constructed temperature-measuring instrument for heating and sanitary industry.

Model Range: 02

• Bimetal thermometer with the vertical stem
• Connection bottom
• Accuracy 2

Available nominal sizes

• NS 63 / 100 / 160

Measuring ranges

• -20-60°C
• 0-100°C
• 0-120°C
• 0-160°C
• 0-200°C

Connection

• Removable thermowell made of brass
• Diameter 11 mm
• G 1/2 A with lateral screw

Nominal length immersion tube

• 45, 63, 100 (made of full material)
• 160, 200 (consisting of several parts, soft or hard solded)

Type 04 Ventilation duct bimetal thermometer

Model Range: 04

• Bimetal thermometer
• for air conditioning and ventilation systems
• Connection centric back
• Accuracy 2
• Case steel galvanized

Measuring range

• -30 – 50° C
• -20 – 60° C

Connection

• Flange diameter 36 mm, material: brass,
• moveable at the plain stem, centric back

Plain stem length

• min. 60 mm (=min. deep)
• 100, 150, 200, 250, 300 mm

Available nominal sizes

• NS 63 / NS 80 / NS 100 / NS 160

Bimetal pointer thermometer high-quality

Type 10 Bimetal thermometer, all stainless steel, connection back

This high-quality version is especially suitable for the many-sided use in mechanical, tank, rapidly flowing, and machinery engineering as well as in the heating industry.

Model Range: 10

• Bimetal thermometer
• NS 63, NS 80, NS 100 and NS 160
• all stainless steel
• Accuracy 1
• Connection back

Measuring range

• with scale division 0.5° C:
• -30 – 50° C / -20 – 60° C 0 – 60° C
• with scale division 1° C:
• 0 – 120° C / 0 – 160° C
• 0 – 40° C / 0 – 200° C / 0 – 250° C / 0 – 300° C

Connection

• without, with admission for protection tube
• You could use the thermometers only together with a suitable protecting tube.

Nominal length immersion tube

• (45), 63, 100, 160, 200, 250, 300, 400

Type 03 Bimetal thermometer, all stainless steel, connection bottom

This high-quality thermometer in all stainless steel is especially suitable for many-sided use in mechanical, tank, rapidly flowing, and machinery engineering as well as in the heating industry.

Model Range: 03

• Bimetal thermometer
• NS 63, NS 100, and NS 160
• all stainless steel
• Connection bottom
• Accuracy 1

Measuring ranges

• -30 – 50° C
• -20 – 60° C
• 0 – 40° C
• 0 – 60° C
• 0 – 120° C
• 0 – 160° C
• 0 – 200° C
• 0 – 250° C
• 0 – 300° C

Nominal length immersion tube

• (45), 63, 100, 160, 200, 250, 300, 400

Connection

• with admission for protection tube

Type B11 Bimetal thermometer, stainless steel with bayonet ring, connection back

Model Range: B11

• Bimetal-Pointer-Thermometer
• NS 63 / NS 100 / NS 160
• Chemical version
• Case with bayonet ring
• External adjustment
• Accuracy 1
• Connection back

Measuring range

• 0 – 60° C up to 0 – 600° C
• (Minus measuring range show data sheet)

Connection thread

• G 1/2 (Standard)
• 1/2 NPT; G 3/4; 3/4 NPT;
• G 1; 1 NPT;
• without thread

Process connection

• Fixed thread (Standard)
• A turntable or with a swiveling nut

Sources : suku.de

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