RS PRO Sensors PRT Guide
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PLATINUM RESISTANCE THERMOMETER (PRT) SELECTION GUIDE

Buy this and more at rspro.com THERMOCOUPLE & PLATINUM RESISTANCE THERMOMETRY - AT A GLANCE Practical Bridge Circuits For 2, 3 And 4 Wire Thermometers The connection between the thermometer assembly and the instrumentation. The cabling introduces electrical resistance which is placed in series with the resistance thermometer. The two resistances are therefore cumulative and could be interpreted as an increased temperature if the lead resistance is not allowed for. The longer and/or the smaller the diameter of the cable, the greater the lead resistance will be and the measurement errors...

Buy this and more at rspro.com COMPARISON OF SENSOR TYPES PLATINUM RESISTANCE THERMOMETER Platinum-wire wound or flatfilm resistor Thermoelement, two dissimilar metals/alloys Ceramic (metal oxides) Long term Stability Variable, Prone to ageing Temperature range Wirewound – slow Film – faster 1-50 secs typical Sheathed – slow Exposed tip – fast 0.1 to 10 secs typical generally fast 0.05 to 2.5 secs typical Constant current required Fairly linear Most types non-linear 3 & 4 wire – low. 2 wire – high Short cable runs satisfactory Electrical pick-up Rarely susceptible Potentiometric input. Cold...

Buy this and more at rspro.com Resistance Thermometers utilise a high precision sensing resistor, usually platinum, the resistance value of which increases with temperature. The dominant standard adopted internationally is the Pt100 which has a resistance value of 100.0 Ohms at 0°C and a change of 38.50 Ohms between 0 and 100°C (the fundamental interval). Thermocouples comprise a thermoelement which is a junction of two specifield, dissimilar alloys and a suitable two wire extension lead. The junction is a short circuit only, the EMF is generated in the temperature gradient between the hot...

Buy this and more at rspro.com COMPARISON OF SHEATH MATERIALS SHEATH MATERIAL Refractory Oxide recrystallised, e.g. Alumina Impervious Good choice for rare metal thermocouples. Good resistance to chemical attack. Mechanically strong but severe thermal shock should be avoided. Forging iron & steel, incinerators, carburizing and hardening in heat treatment, continuous furnaces and glass lehrs. Silicon Carbide (Porous) Good level of protection even in severe conditions. Good resistance to reasonable levels of thermal shock. Mechanically strong when thick wall is specified but becomes brittle...

Buy this and more at rspro.com THIN FILM DETECTORS & WIRE-WOUND DETECTOR ELEMENTS Thin Film Detectors RESISTANCE DIMENSIONS (WIDTH X LENGTH) DUEL ELEMENT (PT100 X2) TOLERANCE CLASS A Wire-Wound Detector Elements This is just a small selection of Detectors offered by RS PRO

Buy this and more at rspro.com PLATINUM RESISTANCE THERMOMETER WITH EXTENDED LEADS Platinum Resistance Pt100 & Pt1000 Detectors with Extended Leads TYPE CABLE LENGTH CABLE TYPE Teflon® insulated Teflon® insulated Teflon® insulated CABLE LENGTH CABLE TYPE Teflon® insulated Teflon® insulated Teflon® insulated Pt100 Tubular Ceramic Insert Elements with tail wires TYPE CERAMIC LENGTH LEAD LENGTH CABLE TYPE CABLE TYPE Teflon® insulated Teflon® insulated CERAMIC DIAMETER Teflon® insulated This is just a small selection of Pt100 Sensors offered by RS

Buy this and more at rspro.com PLATINUM RESISTANCE PT100 SENSORS Pt100 Heavy Duty Sensor Probe, Class B TYPE PROBE DIAMETER PROBE LENGTH CABLE LENGTH CABLE TYPE Flexible silicone rubber insulated, 7/0.2mm Flexible silicone rubber insulated, 7/0.2mm Pt100 Sheathed Thin Film Strip Sensor TYPE CABLE LENGTH CABLE TYPE 7/.02mm Teflon® insulated twin twisted lead PT100 ‘Flat Tip’ Probe TYPE PROBE DIAMETER PROBE LENGTH CABLE LENGTH CABLE TYPE 7/0.2mm Teflon® insulated 2 twisted leads This is just a small selection of Pt100 Sensors offered by RS PRO

Buy this and more at rspro.com PLATINUM RESISTANCE THERMOMETER PT100 PRECISION PROBES Platinum Resistance Thermometer Pt100 Precision Probe TYPE PROBE LENGTH CABLE LENGTH CABLE TYPE PROBE TEMPERATURE RANGE 7/0.2mm PTFE insulated with silver plated copper screen Platinum Resistance Pt100 Dual Element Mineral Insulated Sensor Probe TYPE PROBE LENGTH CABLE LENGTH CABLE TYPE PROBE TEMPERATURE RANGE Mineral Insulated Duplex PRT 7/0.2mm flexible 6 core Teflon® insulated & screened Platinum Resistance Pt100 Dual Element Industrial Sensor Probe TYPE PROBE LENGTH CABLE LENGTH CABLE TYPE PROBE...

PLATINUM RESISTANCE THERMOMETER PT100 WITH STAINLESS STEEL SHEATH Buy this and more at rspro.com Platinum Resistance Pt100 Class B Sensors with Teflon Insulated lead in a Stainless-Steel Tube CLASS PROBE DIAMETER PROBE LENGTH CABLE LENGTH CABLE TYPE Teflon® insulated Teflon® insulated Teflon® insulated Platinum Resistance Pt1000 Class B Sensor with Teflon insulated lead in a Stainless-Steel Tube CLASS PROBE DIAMETER PROBE LENGTH CABLE LENGTH CABLE TYPE Teflon® insulated Platinum Resistance Thermometer Pt100 Industrial Sensor Probe, Class B, in a Stainless-Steel Tube TYPE PROBE DIAMETER...

Buy this and more at rspro.com PLATINUM RESISTANCE PT100 & PT1000 SILICONE PATCH SENSORS Pt100 Silicone Patch Sensor TYPE PATCH LENGTH PATCH WIDTH PATCH HEIGHT CABLE LENGTH CABLE TYPE PATCH LENGTH PATCH WIDTH PATCH HEIGHT CABLE LENGTH CABLE TYPE Pt1000 Silicone Patch Sensor This is just a small selection of Pt100 Sensors offered by RS PRO

Buy this and more at rspro.com HYGIENIC PLATINUM RESISTANCE PT100 THERMOMETER Platinum Resistance Pt100 Hygienic Thermometer, 1.5’’ RJT style fitting SENSOR TYPE SHEATH DIAMETER SHEATH LENGTH SUPPORT DIAMETER SUPPORT LENGTH TRANSMITTER FITTED (3 WIRE CONFIGURATION) NO TRANSMITTER FITTED (4 WIRE CONFIGURATION) Platinum Resistance Pt100 Hygienic Thermometer, 1.5’’ Tri-Clamp fitting SENSOR TYPE SHEATH LENGTH SUPPORT DIAMETER SUPPORT LENGTH TRANSMITTER FITTED (3 WIRE CONFIGURATION) NO TRANSMITTER FITTED (4 WIRE CONFIGURATION) SHEATH DIAMETER This is just a small selection of Pt100 Sensors...