The RFA401 is a temperature assembly combining a spring loaded RTD sensor with a solid drilled stepped flanged thermowell. This heavy duty construction is designed for use within applications involving high pressures and flow rates.
The RFA401 spring loaded temperature sensor is available as a 2, 3 or 4 wire Pt100 or Pt1000 in either simplex, duplex or triplex configuration. The accuracy class can be selected from 1/10 DIN, 1/5 DIN, 1/3 DIN, class A or class B.
This RTD assembly is available with an aluminium, stainless steel or plastic connection head which has a M20 x 1.5 cable entry. The sensor can be terminated with a ceramic terminal block, 4 to 20 mA transmitter or supplied with tails. There is also an option to specify a loop powered or battery powered indicator.
The thermowell features a stepped stem profile for improved response times and has wide variety of flange sizes and ratings available including RF, FF and RTJ configurations.
This style of thermowell is available with a seal or full penetration welded flange, or for ultimate strength machined as a one-piece forging.
The stepped RFA401 flanged thermowell is available in a wide selection of materials including 316 stainless steel, Alloy C276 (Hastelloy®), Alloy 400 (Monel®) and Alloy 600 (Inconel®).
In order to determine or prove the suitability and required dimensions of a thermowell based on the process conditions, we offer wake frequency calculations as per ASME PTC 19.3 TW-2016. In addition there are a number of other certification and testing services available including 3.1 material certificates, dye penetrant testing, positive material identification (PMI) and radiographic inspection (X-Ray).
The RFA401 RTD temperature sensor assembly is additionally available with ATEX Exia, IECEx Exia, UKEX Exia (intrinsically safe), ATEX Exd, IECEx Exd or UKEX Exd (flameproof) hazardous area approval for use within Zones 0, 1, 2, 20, 21 and 22.
If the options provided by our industrial range don’t meet the precise requirements of your application, call our experts on +44 (0)1243 866 866 for a no-obligation consultation about a bespoke solution.
|RTD Sensor||Pt100 • Pt1000|
|Sensor Configuration||Simplex • Duplex • Triplex|
|Sensor Wiring||2 Wire • 3 Wire • 4 Wire|
|Sensor Class||Class B • Class A • 1/3 DIN • 1/5 DIN • 1/10 DIN|
|Approvals||ATEX Exd II 2 GD • IECEx Exd II GD • UKEX Exd II 2 GD • ATEX Exia II 1 GD • IECEx Exia II 1 GD • UKEX Exia II 1 GD|
|Connection Head||Aluminium • 316 Stainless Steel • Plastic|
|Termination||Terminal Block • Temperature Transmitter • Tails|
|Indicator||Battery Powered • Loop Powered|
|Extension||Nipple & Locknut • Nipple Union Nipple|
|Thermowell Design||Solid Drilled|
|Flange Size||1" • 1.5" • 2" • 2.5" • DN25 • DN40 • DN50 • DN80|
|Flange Rating||150lb • 300lb • 600lb • 900lb • 1500lb • PN16 • PN25 • PN40|
|Flange Type||Raised Face (RF) • Flat Face (FF) • Ring Type Joint (RTJ)|
|Construction||Seal Welded • Full Penetration Welded • One Piece Forged|
|Heat Treatment||NACE MR0175/ISO 15156|
|Material||304 Stainless Steel • 310 Stainless Steel • 316 Stainless Steel • Alloy C276 • Alloy 400 • Alloy 600 • Alloy 601 • Alloy 625 • Alloy 800|
|Design Temperature||Low (-196°C to +100°C) • Standard (-50°C to +250°C) • High (-50°C to +650°C)|
Our staff are fully trained to offer comprehensive, and specialist advice on our range of products. Whether you’re not sure what you’re looking for, or you need something highly specialised, give us a call and we’ll be happy to discuss your requirements.
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