DATA SHEET R-CAP
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Ready to use platinum RTD Capsules have insulated lead wires welded and anchored internally. No splicing to fragile elements is required. This construction assures reliable rugged embedment, insertion or probe assembly. Fit in precision diameters from 0.086 to 0.187 inches. Standard sensors and encapsulation materials rated to 540°C (1000°F). Choose the moisture resistant versions for condensing conditions.
 
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Operating Temperature Range
TFF Teflon® leads: –200°C to 260°C (–320°F to 500°F)
Kapton® leads: –200°C to 350°C (–320°F to 660°F)
Fiberglass leads: –75°C to 510°C (–100°F to 950°F)
Moisture resistant: –50°C to 200°C (–60°F to 390°F)

Sensing Element
International grade thin film platinum,
a = 0.00385 Ω/Ω/°C per IEC 751

Ice Point Resistance
100±0.12Ω or 1000Ω±1.2W; International Class B: (±0.12%)

Time Constant (Water at 3ft/second)
0.086 Diameter = 0.5 seconds
0.098 Diameter = 0.6 seconds
0.125 Diameter = 0.8 seconds
0.187 Diameter = 1.5 seconds

Self-Heating
Greater than 15 mW/°C

Interchangeability
±(0.3°C @ 0°C + 0.005 |t|°C) IEC 751 Class B above –50°C

Insulation Resistance
Greater than 50 Megohms at 50 VDC at 25°C

Long Term Stability
Better than 0.05°C (0.02% of resistance) per 5 years,
–50°C to 300°C, 0.25°C per year to 540°C

Maximum Current
100Ω=5 mA, 1000Ω=2 mA for limited self-heating
Also suitable as self-heated sensors

Recommended Current
1 mA maximum for temperature sensing

Moisture Seal
Moisture resistant 0.187 and 0.125 diameters rated 300 PS1.
Consult factory.

Case Materials
Alumina on 0.187, 0.125, and 0.086 dia.
Polyimide (350°C) on 0.098 dia.

Lead Materials
Nickel-coated copper-insulated as follows:
22/28 AWG Fiberglass rated to 510°C (950°F)
for 0.187/0.125 diameter
22/28 AWG TFE Teflon® rated to 260°C (500°F)
for 0.187/0.125 and 0.098 diameter
28 AWG Kapton® rated to 350°C (660°F)
for 0.098/0.086 diameters
Teflon® and Kapton® are registered trademarks of Dupont


 
  29226    <0.187" dia. X 0.6" long alumina  w/22 AWG Teflon® leads, 260°C (500°F)
  29227    <0.187" dia. X 0.6" long alumina  w/22 AWG fiberglass leads, 510°C (950°F)
  29235    <0.187" dia. X 0.6" long alumina  w/22 AWG Teflon® leads, 200°C (390°F), 300 PSI seal - Moisture resistant
  29228    <0.125" dia. X 0.6" long alumina  w/28 AWG Teflon® leads, 260°C (500°F)
  29229    <0.125" dia. X 0.6" long alumina  w/28 AWG fiberglass leads, 510°C (950°F), 3 wire maximum
  29234    <0.125" dia. X 0.6" long alumina  w/28 AWG Teflon® leads, 200°C (390°F), 300 PSI seal - Moisture resistant
  29231    <0.098" dia. X 0.5" long polymide w/28 AWG Teflon® leads, 260°C (500°F), 3 wire maximum
  29232    <0.098" dia. X 0.5" long polymide w/28 AWG Kapton® leads, 350°C (660°F), 3 wire maximum
  29233    <0.098" dia. X 0.6" long polymide w/28 AWG Teflon® leads, 200°C (390°F), 3 wire max. - Moisture resistant
  29326    <0.086" dia. X 0.6" long alumina w/28 AWG Kapton® leads, 350°C (660°F), 2 wire only
 
     RESISTANCE SPECIFICATION @ 0°C
     T01    100 Ω ± 0.12 Ω @ 0°C (a = 0.00385 W/W/°C)
     T10    1000 Ω ± 1.2 Ω @ 0°C (a = 0.00385 W/W/°C)
 
      NUMBER OF LEADS:
       A         2 wire
       B         3 wire (all except 29326)
       C         4 wire: 29226, 29227, 29235, 29228, 29234 only
 
   LEAD LENGTH in inches (12 inches standard)
 
 
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29226
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T01
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B
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72
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–   Typical write-up for 29226 _
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29326
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T10
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A
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24
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–   Typical write-up for 29326