Bi-metal Dial Thermometers

-- Steady & Reliable Manufacturer --

Brief Description

Our Bi-metal Dial Thermometers offer a simple, cost-effective, and robust solution for local temperature indication. They operate on the principle of thermal expansion of two dissimilar metals bonded together.

In-depth Overview

The core component is a bimetallic strip or helix, typically housed within a durable stainless steel stem. As temperature changes, the different expansion rates cause the helix to wind or unwind, directly rotating the pointer on the dial. This mechanical method requires no external power supply, making it highly reliable and suitable for field installation. We offer various mounting types, including back connection, bottom connection, and adjustable angle, to fit diverse installation requirements.

Specification

Parameter	Details
Sensing Principle	Bimetal Helical Coil
Case/Stem Material	Stainless Steel 304/316
Dial Size (Nominal)	63mm, 100mm, 150mm
Accuracy	±1.0% of Full Scale (ASME B40.3 Grade A)
Temperature Range	-70°C to +550°C
Connection Type	Threaded NPT/BSP (male or female)
Mounting Options	Bottom, Back, or Adjustable Angle
Optional Feature	External reset/calibration screw

Applications

Industrial Boilers and Ovens: Monitoring exhaust gas or process chamber temperatures.
Pipelines and Vessels: Local temperature indication for liquids and gases in general industrial processes.
HVAC Systems: Installed on chillers, ducts, and hot water lines for quick diagnostics.
OEM Machinery: Used by machinery manufacturers for integrated temperature monitoring without electrical wiring.

Key Advantages

No External Power Required: Fully mechanical operation ensures reliability in all field conditions.
Cost-Effective: Lower initial cost and simpler installation compared to electronic thermometers.
Fast Response Time: Direct contact sensing provides quick updates to temperature changes.
High Durability: Robust SS construction is resistant to vibration and minor physical impacts.

Payment and Shipping

For volume orders, we offer discounted pricing and accept payments via T/T or Western Union. Bi-metal thermometers are typically standard stock items, allowing for expedited shipping (usually within 7-10 business days for common models). We pack bulk orders using standard export cartons with individual foam inserts to ensure the sensitive dial mechanisms and stems are protected during logistics.

Frequently Asked Questions

Q: Should I use a thermowell with a bi-metal thermometer?
A: Yes, using a thermowell is highly recommended. It protects the thermometer stem from pressure and corrosive media, allows for easy removal and replacement of the thermometer without stopping the process, and ensures better connection integrity.

Q: Can these thermometers be remotely calibrated?
A: Bi-metal thermometers typically have a manual external adjustment screw (often covered by a plug) that allows technicians to perform a field calibration without full disassembly. They cannot be calibrated remotely like electronic devices.

Q: What is the optimal stem immersion length?
A: For accurate reading, the sensing element (the bottom 2-3 inches of the stem) should be fully immersed in the measured medium. The specific required length depends heavily on the pipe diameter and process flow dynamics.

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Bi-metal Dial Thermometers Manufacturers

Wuxi Huihua Special Instrumentation Co., Ltd. was established in December 2001, the registered capital is 5 million yuan, the existing staff of more than 50 small and medium-sized joint-stock enterprises.
The company specialises in the production of various types of special instruments, alternative to the localisation of imported instruments.To seismic pressure gauge, seismic electric contact pressure gauge, stainless steel pressure gauge, diaphragm corrosion-resistant pressure gauge, marine pressure gauge and other series as the main products. On the basis of field instruments, we have developed various kinds of pressure transmitters, pressure controllers, digital pressure gauges and so on. There are more than 30 series and 3000 specifications. Products are widely used in petroleum, chemical, paper, metallurgy, mining, chemical fibre, electric power, food, environmental protection, rubber and plastic, hydraulics and many other industries, and more than 2,000 domestic customers to establish a friendly relationship with the national large and medium-sized enterprises to establish a good partnership, won the majority of users praise, and set up a corporate brand image.