OEM Stainless Steel 4 100mm Bi-metal Thermometer with Electric Switch Contacts - China Suppliers & Factory Direct Offer Manufacturer, Factory

Introducing our advanced electric contact bi-metal thermometer, an essential device for precise temperature measurement in various industrial applications. This thermometer utilizes a bimetallic coil to accurately gauge temperature while incorporating electrical contacts that can activate alarms or control other devices once a predetermined temperature threshold is met. It's the perfect choice for industries such as automation, pipelines, boilers, and HVAC systems, ensuring reliable on-signaling for automatic control, In situations where on-site temperature indication is crucial, and circuits must be actuated simultaneously, our bi-metal thermometer with switch contacts is the ideal solution. The integrated switch contacts—also known as electrical alarm contacts—provide dependable circuit closures based on the position of the instrument's pointer. These contacts are fully adjustable throughout the thermometer's entire measuring range, enabling flexibility in operation, Moreover, the actual value pointer moves smoothly across the scale, independently of the set pointer, which allows for easy adjustments via a window using a removable adjustment key. As a prominent thermometer supplier in China, our factory ensures high-quality manufacturing standards, providing you with a reliable tool that meets the rigorous demands of your operations. Choose our bi-metal thermometer for an effective temperature measurement solution tailored for industrial needs

Product Description

Product Specifications
Case Chromed steel
Size 75mm (3"), 100mm (4")
Ring (Cover) Acrylic in snap-in cover type
Window Polycarbonate or instrumental glass
Pointer Aluminum Alloy, Black Finished, Zero-adjustable
Dial Aluminum alloy in white background, can be in customize brand logo
Connection SS304 (or SS316 as per request). Bottom mounting
Thread 3/8", 1/2"; PT (BSPT, ZG), BSP (G, PF), NPT etc as per request
Sensing Element Bi-metallic coil
Accuracy Class 1.6 as per EN 13190 (as standard), maximum class 1.0
Over Pressure Limit 110% of full scale value
Ambient Temperature -25°C to +65°C
Process Temperature Max. 400°C
Stem Material Stainless steel 304 (SS316 as per request)
Stem Bulb Diameter 6mm or 8mm; length from 50mm to 500mm
Wiring Type Junction box (JB) on right side
Contact Type Sliding switch SPST
Contact Function Single contact N.O. (1a) / Single contact N.C. (1b);
Double contacts N.O.+N.C. (1a1b);
Double contacts N.C.+N.O. (1b1a);
Double contacts N.O.×2 (2a);
Double contacts N.C.×2 (2b)
Protection IP65
Package Natural box package with sticker
Key Features
High reliability and long service life
Universal application
Case and stem from stainless steel
Instruments with inductive contacts for use in hazardous areas
Durable, vibration-resistant, suitable for harsh industrial environments
Can measure wide temperatures from -50°C to 600°C
Customized and often available with different stem lengths, diameters, and case materials
Applications
Boilers, pipelines, and machinery for process control
HVAC systems for heating and cooling regulation
Chemical / petrochemical industry
Food processing industries
Iron and steel industry
Hydraulics and pneumatic
Any application needing local temperature monitoring plus automatic signaling
Frequently Asked Questions
Q What case sizes are available for this bimetallic thermometer with switch?
The thermometer is available in two standard dial case sizes: 75mm (3 inch) and 100mm (4 inch). The stem bulb diameter can be either 6mm or 8mm, with immersion lengths ranging from 50mm to 500mm to accommodate various installation depths and pipeline configurations.
Q What is the maximum process temperature this thermometer can withstand?
The thermometer supports a maximum process temperature of 400°C. Its bi-metallic coil sensing element is capable of measuring across a wide range from -50°C to 600°C, while the unit itself is rated for ambient operating conditions between -25°C and +65°C.
Q Which thread connection standards does this thermometer support?
The thermometer supports a wide range of thread standards, including 3/8" and 1/2" sizes available in PT (BSPT, ZG), BSP (G, PF), and NPT formats. All connections use bottom mounting with SS304 as standard; SS316 material is available upon request. Custom thread types can also be accommodated for specific project needs.
Q What switch contact configurations are available?
The sliding switch SPST contact output supports five configurations: Single contact N.O. (1a), Single contact N.C. (1b), Double contacts N.O.+N.C. (1a1b), Double contacts N.C.+N.O. (1b1a), Double contacts N.O.×2 (2a), and Double contacts N.C.×2 (2b). This flexibility makes the instrument suitable for a wide variety of alarm and control circuit designs.
Q Is this thermometer rated for use in hazardous or outdoor environments?
Yes. The thermometer carries an IP65 protection rating, providing full dust ingress protection and resistance to water jets from any direction. It also features inductive contacts approved for use in hazardous areas, and its vibration-resistant stainless steel construction makes it well-suited for demanding outdoor and industrial installations.
Q Can the dial face and product specifications be customized?
Yes. The aluminum alloy dial with white background can be printed with a custom brand logo. Beyond cosmetic customization, many mechanical parameters are configurable — including stem length and diameter, connection material (SS304 or SS316), thread standard, and contact function — to meet the exact requirements of your application or OEM project.

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