DATA SHEET MET-CAP
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Ready-to-use Platinum RTD capsules are sealed in stainless steel. These capsules can outperform traditional more costly RTD assemblies over the -50°C to +232°C temperature range. Standard sheath diameters are completely sealed and ready to use. The void free construction assures fast response. The leadwire is stranded nickel-plated copper with TFE Teflon® insulation. These all-purpose capsules are especially suitable for wet or shallow immersion applications.
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Operating Temperature Range
-50°C to 232°C (-60°F to 450°F),
to 260°C (500°F) in dry applications.
Sensing Element
International grade thin film platinum,
a = 0.00385 Ω/Ω/°C per IEC 751 or
Industrial grade thin film platinum,
a = 0.00375 Ω/Ω/°C
Ice Point Resistance
100±0.12 Ω or 1000±1.2 Ω
Time Constant (Water at 3ft/second)
0.125 Diameter = 1.1 seconds
0.187 Diameter = 2.0 seconds
0.250 Diameter = 3.1 seconds
Self-Heating
Greater than 25 mW/°C
Interchangeability
±(0.3°C + 0.005 |t|°C), IEC 751 Class B
Long Term Stability
Better than 0.05°C (0.02% of resistance)
per 5 years, -50°C to 200°C

Insulation Resistance
Greater than 50 Megohms at 50 VDC at 25°C
Maximum Current
Should be limited to 2500 µW @ 0°C;
5 mA for 100 Ω units, 1.6 mA for 1000 Ω units
Recommended Current
1 mA maximum for temperature sensing
Moisture Seal
Leads sealed against moisture suitable for shallow immersion
Case Materials
300 series stainless steel
Lead Materials
Nickel-plated copper wire, insulated as follows:
#22 AWG TFE Teflon® rated to 260°C (500°F) for
all 0.250" Diameter and 2 wire 0.187" Diameter units
#28 AWG TFE Teflon® rated to 260°C (500°F) for
all 0.125" Diameter and 3 or 4 wire 0.187" Diameter units
Other Features
Strong welded leads, strain isolated, fully sealed,
and full platinum RTD stability.
Teflon® are registered trademarks of Dupont

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    29258     Diameter = 0.250" + 0.004" – 0.00"  Length = 2.00" ± 0.03" Stainless Steel
    29259     Diameter = 0.187" + 0.004" – 0.00"  Length = 2.00" ± 0.03" Stainless Steel
    29260     Diameter = 0.125" + 0.003" – 0.00"  Length = 2.00" ± 0.03" Stainless Steel
 
     RESISTANCE SPECIFICATION @ 0°C
     T01    100Ω± 0.12Ω @ 0°C  (a = 0.00385 Ω/Ω/°C Intl. Grade IEC 751 Class B)
     T10    1000Ω ± 1.2Ω @ 0°C  (a = 0.00385 Ω/Ω/°C Intl. Grade IEC 751 Class B)
     H10    1000Ω ± 1.2Ω @ 0°C  (a = 0.00375 Ω/Ω/°C Industrial Grade)
 
      NUMBER OF LEADS
      A       2 wire
      B       3 wire
      C       4 wire
 
   LEAD LENGTH  in inches (12 inches standard)
 
 
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29258
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T01
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B
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72
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 Typical write-up for 29258 _
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29259
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T10
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A
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24
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 Typical write-up for 20259

SCHEMATIC DIAGRAM