Heavy Duty Resistance Thermometers (RTD)

-- Steady & Reliable Manufacturer --

Brief Description

Heavy Duty Resistance Thermometers (RTDs), primarily using the Pt100 or Pt1000 element, provide highly accurate and repeatable temperature measurement, built with robust construction for demanding industrial service.

In-depth Overview

RTDs operate on the principle that electrical resistance changes reliably with temperature. Unlike fragile standard RTDs, our heavy-duty models feature a thick-walled protective sheath and are often mineral insulated (MI) to withstand extreme vibration and high-pressure media. They offer superior stability and long-term accuracy compared to thermocouples in their typical operating range. The common 3-wire or 4-wire connection configurations minimize lead resistance effects, ensuring precise signal transmission back to the control system.

Specification

Parameter	Details
Sensing Element	Pt100 or Pt1000 (Class A or AA)
Configuration	2-wire, 3-wire, or 4-wire circuit
Sheath Material	SS 316, Inconel, or Ceramic
Temperature Range	−200∘C to +600∘C (element specific)
Sheath Diameter	6mm, 8mm, 10mm, 12mm (heavy duty)
Process Connection	Threaded (NPT/BSP) or Fixed Flange
Protection Head	Aluminum Alloy or Stainless Steel (IP65+)
Insulation	Mineral Insulated (MI) or High Purity Ceramic

Applications

Power Plants: Monitoring bearing temperatures, motor windings, and steam pipe temperatures with high accuracy.
Compressors and Turbines: Measuring temperatures in environments subject to high mechanical vibration.
Refineries and Chemical Processing: Used in critical control loops where high accuracy and stability are paramount.
Foundries and Metal Works: Measuring temperatures in furnaces and heating processes (high temperature models).

Key Advantages

High Accuracy: Generally more accurate and stable than thermocouples in the mid-range temperatures.
Superior Durability: Mineral Insulated (MI) construction ensures the sensing element can withstand severe vibration and bending stress.
Long-Term Stability: Minimal drift over extended periods, reducing the need for frequent re-calibration.
Easy Interface: Compatible with most standard industrial controllers and transmitters.

Payment and Shipping

We accept secure international payments including T/T and PayPal (for smaller orders or samples). Manufacturing lead times for custom-length heavy-duty RTDs average 2-3 weeks. We use specialized foam padding within corrugated boxes for shipping to protect the sensing tip and terminal head, ensuring the precision element remains undamaged during global transit.

Frequently Asked Questions

Q: Why choose an RTD over a Thermocouple?
A: RTDs offer much higher accuracy and stability, especially below 600∘C, and do not require a separate cold-junction compensation (CJC). Thermocouples are generally preferred for very high temperatures or faster response times.

Q: What does "Pt100" mean?
A: Pt stands for Platinum, the resistance material. The number 100 indicates that the element has a resistance of 100 ohms (Ω) at 0∘C. Pt1000 means 1000 ohms at 0∘C.

Q: How does the 3-wire or 4-wire connection improve accuracy?
A: Lead wires have resistance that can skew the reading. A 3-wire configuration compensates for lead resistance by using two wires for current and one for voltage measurement. A 4-wire configuration offers the best compensation by using separate pairs for excitation and sensing.

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Heavy Duty Resistance Thermometers (RTD) 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.