DATA SHEET R-IMM
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Sensors 29272 and 29280 are completely immersible in aggressive chemicals at high temperatures. May be surface mounted and submerged. For tight temperature control, this low cost versatile platinum RTD features 0.05°C stability and small size. Available in 100 or 1000 ohm configurations with two, three or four wire flat cable, Model 29280 fits through a 1.4mm (0.055 inch) gap for maximum accessibility up to 260°C (500°F). Model 29272 with tough, round cable leads and lower cost is useful in temperatures up to 232°C (450°F).
 • High Temperature Flat Design
 • Fits Narrow Accesses
 • Platinum RTD Stability
 • Standard Curves
 • Low Cost
 • Custom Lead Length
 • Universal configuration is also surface mountable
 • PFA Sensor for Maximum Temperature and Maximum   Chemical Resistance
 
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Temperature Range
29272: –200°C to 232°C (–320°F to 450°F)
29280: –200°C to 260°C (–320°F to 500°F)
Sensing Element
International grade thin film platinum, a = 0.00385 Ω/Ω/°C or
Industrial grade thin film platinum, a = 0.00375 Ω/Ω/°C
Ice Point Resistance
100±0.12Ω or 1000±1.2Ω; IEC 751 Class B (±0.12%)
Time Constant
<0.3 Seconds on metal surfaces
Self-Heating
>25 mW/°C immersed
Interchangeability
±(0.3°C @ 0°C + 0.005 |t|°C), IEC 751 Class B, above –50°C
Long Term Stability
Better than 0.05°C (0.02Ω) per 5 years, above –50°C
Insulation Resistance
>50 MegOhms at 50VDC at 25°C

Maximum Current
100Ω = 5mA, 1000Ω = 2mA for limited self heating
Recommended Current
1mA
Carrier Material
Kapton®
Lead Materials
Stranded copper cable insulated as follows:
29272: 22 AWG tin-plated, (2-wire) FEP Teflon® over each
       twisted black/red, FEP overall.
       24 AWG tin-plated, (3-wire) FEP Teflon® over each
       twisted white/2 red, FEP overall
29280: 26 AWG nickel-plated, PFA Teflon®, 2 white,
       2 white/brown, or 2 white/2 red fused parallel
Sizes
29272: 0.3" wide x 0.8" long x 0.05" thick, 0.11" diameter cable
29280: 0.25" or 0.30" (4-wire) wide x 0.5" long x 0.05" thick,
              0.04" thick flat cable

Teflon® and Kapton® are registered trademarks of Dupont

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   29272   RTD with FEP sensor and lead cable encapsulation
   29280   RTD with PFA sensor and lead encapsulation
 
   RTD RESISTANCE SPECIFICATION (ohms @ O°C)
   T01 100W ±0.12Ω @ 0°C, 0.06"x0.1 sensor   (a = 0.00385 Ω/Ω/°C International Grade IEC 751 Class B)
   T10 1000Ω ±1.2W @ 0°C, 0.08"x0.13 sensor  (a = 0.00385 Ω/Ω/°C International Grade IEC 751 Class B)
   H10 1000Ω ±1.2W @ 0°C, 0.07"x0.1 sensor   (a = 0.00375 Ω/Ω/°C Industrial Grade Class B)
 
      NUMBER OF LEADS:
      A      2 wire
      B      3 wire
      C      4 wire (29280 only)
 
   LEAD LENGTH in inches (12 inches standard)
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29272
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T10
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A
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72
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–  Typical write-up for 29272 _
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29280
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T01
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C
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12
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–  Typical write-up for 29280