Gauge pressure transmitter - high pressure – 70 MPa – nuclear – FKR

Features

The FCX-AIV series FKR nuclear gauge pressure transmitter is specially designed to provide reliable and accurate measurements in the most demanding nuclear environments, particularly for functions related to plant safety.

Designed for high-pressure nuclear applications, the FKR nuclear sensor is capable of measuring high relative pressures up to 70 MPa (700 bar or 10.15 kpsi), while withstanding the severe stresses associated with nuclear environments, such as high temperatures and prolonged operating conditions. Its design and choice of materials are tailored to the specific requirements of nuclear processes.

The pressure transmitter incorporates silicon piezoresistive technology combined with digital signal processing, ensuring accurate, stable, and long-lasting measurement. Compatible with the HART communication protocol, it facilitates integration into nuclear control and instrumentation systems, while meeting nuclear safety and long-term facility operation requirements.

Type		Smart 4-20 mA pressure transmitter with HART™ 7 protocol
Housing		L- or T-shaped housing
Measurement ranges [max. scale]		-0.1...4.75 MPa to -0.1...70 MPa
Measurement limit		-100 to 70,000 (kPa)
Permissible overpressure		105 MPa
Weight (without indicator)		1.5 kg
Accuracy		From 1/10 to 1/1 of URL: ±0.065 % of span From 1/16 to 1/10 of URL: ±(0.015 + 0.05 × 0.1 × URL/span) % of span
Materials in contact with the fluid	Membrane	Inconel® 625 (with or without gold plating)
	Connection	Stainless steel 318LN or Inconel® 625
	Sensor body	Stainless steel 316L or Inconel® 625
Non-contact materials	Housing	Aluminum or 316L stainless steel
	Filling fluid	Silicone oil
Stability		±0.1% of upper range limit for 5 years
Elevation / Suppression		0.1 to 70 MPa
Scale setting range		From 1 to 1/16 of maximum scale
Measurement cycle		40 ms
Communication protocol		HART™ 7
Response time		140 ms
Process temperature		From -40 to 100°C
Ambient temperature		From -40 to +85°C -20 to +80°C (with optional LCD unit) -40 to +60°C (with optional lightning arrester)
Storage temperature		From -40 to +90°C
Temperature effects		Total effect: ±(0.095 + 0.0125 × URL/range) % / 28 °C
Supply voltage		10.5 to 45 V DC
Output signal / Load resistance		4…20 mA / 24 Vdc, 250 Ωnominal
Dielectric strength		500 V AC for 1 min (between circuit and earth)
Insulation resistance		> 100 MΩ at 500 V DC (between circuit and ground)
Damping		Configurable from 0.04 to 32 seconds
Zero and span adjustment		Via external sensor screw, local three-button indicator or HART™ protocol
Electrical connections		M20 x 1.5 or ATEX explosion-proof cable gland, or Souriau 8N35 connector, or Souriau 8N45S base, or Souriau 8N45 connector, or SAIB NU25 base, or Jaeger base
Assembly		Direct mounting or mounting on 2" pipe (DN50)
Process connection		1/4-18 NPT (F): Direct mounting or FKG type conversion 1/2-14 NPT (F): Direct mounting
Qualification		K3A/1E following RCCE-2019
Certification		ATEX/IECEx/cCSAus: Intrinsic safety and explosion-proof enclosure
Options		Digital indicator, degreasing treatment, additional stainless steel identification plate

Conversion from FKR gauge pressure transmitter to FKG gauge pressure transmitter

It is possible to convert a gauge nuclear pressure transmitter FKR 700 bar to a gauge 500 bar pressure transmitter.

This adaptation is based on the addition of a process flange mounting adapter, which preserves the process interfaces and mechanical mounting interfaces of an FKG 500 bar sensor.

It thus enables the implementation of FKR 700 bar transmitters to replace the existing FKG 500 bar pressure transmitters, while ensuring continuity of operation and compliance with nuclear requirements.

Documentation

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