Our heritage in nuclear qualified sensors and related accessories stretches back to 1968. Today we offer a comprehensive range of temperature and pressure sensors to support safe and effective, long term operation of nuclear plants.
Nuclear Qualified Temperature Sensors
IEE 323/344
The model N9001 series RTD is designed for use as a wide range thermowell mounted sensor in the primary coolant loop of PWR (Pressurized Water Reactor) nuclear generating facilities. The RTD is qualified per IEEE 323-1974/1983 and IEEE 344-1975/1987 for use in Class 1E harsh environments, but can also be used for non-safety applications.
The model N9004 fast time response RTD is designed to be installed in a compatibly designed thermowell for rapid detection of temperature changes in the Hot and Cold legs of the reactor coolant loops (RCS) of PWRs (pressurized water reactors). The N9004 RTD is currently installed in many operating PWR nuclear plants, with some of the original installations occurring in the early 1980’s. There is little drift of either calibration or time response associated with normal operating conditions. Thus, the RTD assembly has low maintenance costs. Also, due to unique design features, ALARA amounts are reduced during installation and removal, especially when a Quick Disconnect Connector (QDC) is used.
- Reactor coolant loops (RCS) hot and cold legs
- Reactor coolant pumps
- RCS wide range
- Feedwater systems
- RHR/SIS systems
The model N9339 flexible RTD is specifically designed and qualified for
use in CANDU powerplants for installation into a guide tube interfaced with a thermowell or thermal block. The RTD is qualified per IEEE 323-1974/1983 and IEEE 344-1975/1987 for use in Class 1E harsh environments but can also be used for non-safety applications.
- Feeder tube temperature monitoring for CANDU reactors
- Hydrogen recombiner temperature measurement
- Emergency diesel generator coolant temperature measurement
- Bearing temperature measurement
- Inlet and outlet service temperature measurement
The model N9356 Rigid RTD is specifically designed and qualified for use in CANDU power plants for installation into an adapter fitting interfaced with a thermowell or direct installation on a bracket. The RTD is qualified per IEEE 323-1974/1983 and IEEE 344-1975/1987 for use in Class 1E harsh environments, but can also be used for non-safety applications.
- Inlet & outlet service temperature measurement
- Hydrogen recombiner temperature measurement
- Emergency diesel generator coolant temperature
- Bearing temperature measurement
- Air temperature monitoring (non-thermowell mount)
- Direct replacement for obsolete Rosemount Model 104ACF
The model 612 spring-loaded RTD is designed for a wide range of nuclear applications. The sensor is intended to be installed in a thermowell or protection tube. The spring-loading action ensures proper contact with the tip of the thermowell or protection tube for optimal heat transfer. This sensor model is optimally configured for use with a terminal block and terminal block connection head. The RTD is qualified per IEEE 323-1974/1983 and IEEE 344-1975/1987 for use in Class 1E harsh environments.
- Wide range of nuclear applications
- Installed in thermowell or protection tube
- Spring-loaded for optimal heat transfer
- Qualified for use in Class 1E harsh environments
RCC-E/M
Nuclear Qualified Temperature Transmitters
The N7030 and N7040 analog temperature transmitter series are two-wire 4-20 mA DC current loop powered temperature transmitters. They are analog signal conditioning devices designed to accept standard RTD or thermocouple inputs and convert the input to a linearized 4-20 mA DC output signal that is proportional to the input. The transmitter is nominally powered from a 24 VDC supply but will accept any regulated DC supply such that the voltage measured at the transmitter’s terminals is between 14 and 48 VDC under all conditions.
- True analog transmitter
- Qualified per IEEE 323 Class 1E Mild Environment
- Qualified per IEEE 344 Class 1E Seismic
- Loop powered 14 to 48 VDC
- Analog ANSI-ISA, NAMUR 43
- EMC, NRC RG 1.180, CE
Nuclear Qualified Thermowells
Parts and Accessories
Connections heads
Nuclear temperature spare parts