Duplex & Dual-Element Temperature Sensor Assemblies
Two independent sensing circuits in one assembly for redundancy, split instrumentation, and TC/RTD mixed measurement points.
Product Overview
Two Measurement Circuits in One Process Connection
Duplex and dual-element assemblies place two independent sensing circuits in one probe, insert, or head-style assembly. They can be built as two thermocouples, two RTDs, or a mixed TC/RTD assembly when the application needs both thermocouple behavior and RTD stability at the same measurement point.
Duplex Assembly Redundancy Strategy
The key decision is how the two circuits will be used: redundant control, independent indication, control/alarm separation, data logging, or comparison between thermocouple and RTD measurement systems.
Dual-Circuit Temperature Assembly
Use this shared process connection and larger head format when two independent sensing channels are needed in the same installed location.
Common Duplex Assembly Builds
Thermocouple / Thermocouple
TC/TC duplex builds are used where high temperature capability, rugged construction, fast response, or thermocouple input hardware drives the specification. Typical uses include redundant hot-process control, high-limit alarm separation, and independent recorder/control channels.
RTD / RTD
RTD/RTD duplex builds are used where accuracy, repeatability, and long-term stability matter most. They are common when one RTD supports the control loop and the second supports validation, monitoring, alarm logic, or a backup transmitter.
Thermocouple / RTD Mixed Assembly
Mixed TC/RTD assemblies are specified when one installed point needs two measurement behaviors: the thermocouple for rugged high-temperature response or system compatibility, and the RTD for stable precision measurement or comparison.
Wiring and Head Options
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