What Is a Bi-Metal Thermometer?
The bi-metal thermometer is a simple, durable, and inexpensive temperature measuring device. The bimetal thermometer combines two different metals with linear expansion coefficients. Different metals expand at different rates when heated. The bimetallic strip particles deflect to indicate the temperature. Therefore, bi-metal thermometers are also called dial thermometers.
WSS series bi-metal thermometer is an on-site detection instrument for measuring low and medium temperatures. Directly measure the temperature of fluid, steam, and gas in the range of -80℃～500℃. The structure of the bimetal thermometer is divided into radial, axial and universal.
Features of SI-WSS Adjustable Angle Bi-metal Thermometer
- WSS bimetal thermometer is waterproof and dustproof to IP65.
- It is anti-corrosion and anti-vibration. The whole instrument is made of stainless steel. It is suitable for corrosive occasions.
- The dial of the oil-filled bimetallic thermometer is filled with oil, which increases the damping of the pointer and plays a seismic effect.
- When the hot-jacket bimetal thermometer needs to be replaced when the equipment is overhauled or the bimetal thermometer is damaged, there is no need to cool down, reduce pressure, or stop the machine. You only need to remove the watch core. The enterprise can avoid unnecessary economic losses. Continuous production can be achieved.
- The electrical contact bimetal thermometer has a mechanical electrical contact device. When the temperature of the measured medium changes. The thin shaft on the free end drives the pointer and the movable contact to rotate. The temperature change value is indicated on the dial. When it is with The instant when the fixed contact is contacted or disconnected. The relay and contactor in the external circuit system are activated to achieve the purpose of automatic control and alarm.
- This instrument has reliable structure, novel appearance, light weight and beautiful appearance.
Adjustable Bimetal Thermometer Specifications:
- Accuracy: ± 1.5% Full Scale (ASME B40.3 Grade A)
- Dial Size: 63 up to 150 mm
- Dial Material:
- Anodized aluminum with black marks on satin matte finish background;
- White or Hi-Vis™ background available.
- Stem Length: 2.5 – 24″, other lengths available
- Stem Diameter: 1/4” (std)
- Head, Bezel, Mounting Bushing, Stems: 300 Series SS, 316SS (optional)
- Operating Conditions:
- The head temperature should not exceed 200°F (150°F if silicone filled).
- The stem should not be exposed to continuous temperatures exceeding 50% over-range or 800°F(550°F if silicone filled).
- Temperature Ranges: See inside back cover of temperature catalog for the complete list of ranges.
- Case Rating: IP67, NEMA 6 Rated (Hermetically sealed per ASME B40.3)
- Lens: Glass (std), Acrylic, Polycarbonate, Tempered Glass, Laminated Safety Glass
- Immersion: Minimum 2” in liquid, and 4” in gas for most ranges. Certain ranges require up to 4” in liquids & 5” in gas
- Mounting Connection: 1/2” NPT (std), 1/4” NPT, 3/4” NPT, Plain Hex Bushing, 1/2” BSPT, 1/2” NPT Union, Sanitary Tri-Clamp®
- Temperature Sensing Area: Last 2” to 4” of the stem
Note:
Thermowells should be used whenever the stem or bulb would be exposed to pressure, corrosion, velocity, abrasion or shear forces.
Thermowells also make it possible to remove the thermometer, without losing pressure or the contents of the process.
| Measuring range °C | Scope of application | |
| Industrial, commercial | Laboratory, small | |
| -80～+40 | √ | √ |
| -40～+80 | √ | √ |
| 0～50 | √ | √ |
| 0～100 | √ | √ |
| 0～150 | √ | √ |
| 0～200 | √ | √ |
| 0～300 | √ | √ |
| 0～400 | √ | √ |
| 0～500 | √ | √ |
Drawings of Adjustable Angle Bimetal Thermometer
| Form | A | B | C | E | L | d |
| Axial type | 65 | 23 | 73 | – |
75 100 150 200 300 400 500 750 1000 |
Φ6 Φ8 Φ10 |
| 105 | 23 | 73 | – | |||
| 155 | 23 | 73 | – | |||
| Radial type | 65 | 50 | 110 | 34 | ||
| 105 | 50 | 110 | 34 | |||
| 105 | 50 | 110 | 34 | |||
| 135°direction | 105 | 23 | 85 | – | ||
| 155 | 23 | 85 | – | |||
| Universal type | 105 | 23 | 178 | 120 | ||
| 155 | 23 | 178 | 120 |
Adjustable Angle Bi-metal Thermometer Applications
The bimetal thermometer is an on-site detection instrument for measuring low and medium temperatures.
The bimetal thermometer can directly measure the temperature of the liquid, steam, and gaseous media in the range of -80℃～+500℃ in various production processes.
The bimetallic thermometer features an on-site temperature display, which is intuitive and convenient. Safe and reliable. long-lasting. It has a variety of structural forms. Can meet different requirements.
Bimetal thermometers are available in axial type, radial type, universal type, and other meter head models. The length of the bimetal thermometer probe can be customized according to customer needs.
The on-site temperature display is intuitive, convenient, safe, and reliable, and has a long service life. The core-pulling thermometer can maintain or replace the movement in a short time without stopping the machine. Axial type, radial type, 135 type, universal type, and other varieties are complete. Adapt to various on-site installation needs.
Extended reading: Tri Clamp Sanitary Thermometers
Bi-metal Thermometer Order Guide
| Model | WSS | Bimetallic thermometer | ||||
| Nominal diameter of dial | 3 | Φ60 | ||||
| 4 | Φ100 | |||||
| 5 | Φ150 | |||||
| Dial form | 0 | Axial (straight) | ||||
| 1 | Radial (angle type) | |||||
| 2 | 135° direction (obtuse angle type) | |||||
| 8 | Universal (adjustable angle type) | |||||
| Installation fixed form | 0 | No fixtures | ||||
| 1 | Movable external thread | |||||
| 2 | Movable internal thread | |||||
| 3 | Fixed thread | |||||
| 4 | Fixed flange | |||||
| 5 | Ferrule thread | |||||
| 6 | Ferrule flange | |||||
| Form of protection | – | normal type | ||||
| W | Protection type | |||||
| F | Anticorrosive | |||||
| Model | Temperature range | Accuracy class | Protection tube material | Standard | Installation fixed form | |
| D | L | |||||
| WSS-480 |
-80～+40 -40～+80 0～50 0～100 0～150 0～200 0～300 0～400 0～500 |
1.5 |
1Cr18Ni9Ti 304 316 316L Hastelloy C-276 PTFE anti-corrosion |
Φ100 |
75 100 150 200 300 400 500 750 1000 1500 2000 |
No fixtures |
| WSS-580 | Φ150 | |||||
| WSS-481 | Φ100 | Movable external thread | ||||
| WSS-581 | Φ150 | |||||
| WSS-482 | Φ100 | Movable internal thread | ||||
| WSS-582 | Φ150 | |||||
| WSS-483 | Φ100 | Fixed thread | ||||
| WSS-583 | Φ150 | |||||
| WSS-484 | Φ100 | Fixed flange | ||||
| WSS-584 | Φ150 | |||||
| WSS-485 | Φ100 | Ferrule thread | ||||
| WSS-585 | Φ150 | |||||
| WSS-486 | Φ100 | Ferrule flange | ||||
| WSS-586 | Φ150 | |||||
Selection instructions:
Please provide the model, dial diameter, accuracy grade, installation and fixing form, temperature measurement range, protective tube material, protective tube diameter, length, or insertion depth.
Selection examples:
Universal bimetal thermometer, dial diameter Φ100, temperature measurement range 0～400℃, level 1.5, movable external thread M27×2, length 450mm WSS-481, 0～400℃, L=450, M27×2, level 1.5
Installation and Use Procedure, All Angle Thermometer
CAUTION:
This thermometer is designed to allow the face to be positioned, so that it can be easily read.
Sino-Instrument recommends that the thermometer be positioned only one time, to assure proper performance during its lifetime.
A. Carefully remove the thermometer from the shipping box.
Inspect for any shipping damage. If damaged report it to your freight carrier.
B. Loosen, but do not remove, the bracket set screws (see sketch) so that the bracket can rotate around the stem.
(Do not turn the calibration screw unless calibration is desired).
C. Rotate the bracket by hand so the stem may be flexed in the desired direction. Tighten the “A” bracket set screws.
D. Grasp the head and stem approximately were shown and adjust the head to the desired angle.
E. Tighten the “B” bracket set screws.
F. Install the thermometer into the process fitting or thermowell.
Tighten the hex screw, using an open-end wrench of the appropriate size.
Continue to tighten the hex screw until the head is facing the desired position.
Maintenance of SI-WSS Adjustable Angle Bimetal Thermometer
1) Cleaning:
a) Keep the dial lens clean for proper viewing.
Clean using commercial window cleaner.
b) Periodic cleaning of residue from the stem may be required to ensure thermometer sensitivity if installed without a thermowell.
2) Calibration:
Periodic calibration should be as determined by the user.
a) Immerse the thermometer stem into a temperature-calibrated medium. Immerse entire stem or 4” (100mm) minimum.
b) Use a small open-end wrench or flat tipped screwdriver to turn the calibration screw.
Turn the calibration screw to adjust the thermometer pointer, to the correct temperature if necessary.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
SI-WSS Adjustable Angle Bi-metal Thermometer | Sino-Inst
The bi-metal thermometer is a simple, durable, and inexpensive temperature measuring device. The bimetal thermometer combines two different metals with linear expansion coefficients. Different metals expand at different rates when heated. The bimetallic strip particles deflect to indicate the temperature. Therefore, bi-metal thermometers are also called dial thermometers.
Product SKU: si-wss-adjustable-angle-bimetal-thermometer
Product Brand: Sino-Inst
Product Currency: USD
Product Price: 39
Price Valid Until: 2029-09-09
Product In-Stock: InStock
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