HollySys WZ-K Armored Resistance Temperature Detectors (RTD) are constructed with multiple (typically 3 or 6) nickel wire core conductors, encapsulated in inorganic insulation and a metal sheath, then compacted into a solid unit. This assembly, known as armored thermal resistance material, is integrated with a resistance temperature sensing element, insulating filler, and a metal protective tube via argon arc welding-forming an armored RTD temperature sensor designed for precise temperature measurement. The product primarily consists of a junction box, an internal lead assembly, and the armored RTD sensing element, along with various mounting fixtures. Its temperature-sensitive component functions similarly to that of a standard assembled RTD. When paired with display instruments or control systems, the armored RTD serves as a temperature sensor for measuring and regulating temperatures in industrial processes (-200°C to +650°C), including those involving liquids, vapors, gaseous media, and solid surfaces. It is widely used in the petroleum, chemical, power, metallurgical, food processing, and research sectors.
Product Features
Compact and Flexible Design
Measuring end diameter as small as 3 mm, with lengths extendable to several meters.
Rapid Thermal Response
Minimizes dynamic error for accurate real-time measurements.
Material Efficiency
Optimized design reduces consumption of precious metals (e.g., silver wire)
Bendable Installation
Flexible enough for use in tight spaces (excluding the area within 50 mm of the sensing tip).
Excellent Sealing and Mechanical Properties
Resistant to pressure, vibration, and impact.
Superior Temperature Resistance
Operates reliably under both low- and high-temperature conditions.
Standards Compliance
Conforms to JB/T 8622-1997 (Industrial Platinum RTD Technical Standard) and is equivalent to IEC 751.
Technical Specifications
· Accuracy Class: Class A, Class B
· Measuring Range: -200 to 650°C (select device code)
· Temperature Sensor: RTD Pt100
· Sheath Material: 304SS, 316SS, 316L (can be customized by user)
· Hosing Material: Aluminium alloy, 304SS
· Ingress Protection: IP66
· Electrical Connection: M20×1.5 or 1/2" NPT
Mounting Type
Waterproof Type (Non-Fixed)/Waterproof Type with Thread/Waterproof Type with Compression Thread
Waterproof Type with Flange/Waterproof Type with Compression Flange
Packaging & Delivery
Category |
Product Size |
International Commercial Terms (Incoterms) |
Terms of Payment |
Nearest Port |
WZ-K Armored RTD |
50 cm*58 cm*30 cm |
CIF, CFR, DAP |
LC, T/T, D/P |
Shanghai, Guangzhou, Tianjin |
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