RTDs / Miniature RTDs : Sealed Metal Mini Probes

SEALED METAL RTD MINI PROBES

29258, 29259, 29260, 29348, 29362

29258, 29259, 29260

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 TEE Teflon® insulation. These all purpose capsules are especially suitable for wet or shallow immersion applications.

Performance Specifications

   
 

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

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.
Better than ±0.25°C per 5 years above 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 Material
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 Feature
Strong welded leads, strain isolated, fully sealed, and full platinum RTD stability.

   

Teflon® is a registered trademark of the DuPont Corporation.

Dimensional Drawing

Ordering Specifications

    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    100.00Ω ± 0.12Ω @ 0°C  (α = 0.00385 Ω/Ω/°C Intl. Grade IEC 751 Class B)
     T10    1000.00Ω ± 1.2Ω @ 0°C  (α= 0.00385 Ω/Ω/°C Intl. Grade IEC 751 Class B)
     A01    100.00Ω ± 0.06Ω @ 0°C  (α = 0.00385 Ω/Ω/°C)
     A10    1000.00Ω ± 0.60Ω @ 0°C  (α = 0.00385 Ω/Ω/°C)
 
      NUMBER OF LEADS
      A       2 wire
      B       3 wire
      C       4 wire
 
   LEAD LENGTH  in inches (12 inches standard)
 
 
29258
–
T01
–
B
–
72
–  Typical write-up for 29258
29259
–
A10
–
A
–
24
–  Typical write-up for 29259

Schematic Diagram

29348, 29362

Small:
Small size fits tight places
Fast:
Low Mass means quick respons
Accurate:
 Platinum Sensor offers greatest stability
Wide Range:
Accurate temperature measurement from -200°C to 510°C
Durable:
Lead wires are welded and anchored

To satisfy the demand for smaller components, RdF has introduced ultra-small diameter RTD Capsules with a super fast response time. These ready to use platinum RTD Micro-Capsules have two insulated lead wires welded and anchored internally. This construction assures reliable rugged embedment, insertion or probe assembly. Precision diameter are 0.066” max. stainless steel and 0.086” max. alumina.

Temperature ratings are up to 510°C(950°F). Choose a moisture rated version for condensing conditions. Model 29348 will also withstand shallow immersion.

Dimensional Drawing

Performance Specifications

   
 

Temperature Range
Teflon® leads: -50°C to 200°C (-60°F to 390°F),
Kepton® leads: -200°C to 350°C(-320°F to 660°F)
Fiberglass leads: -75°C to 510°C(-100°F to 950°F)

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

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

Time Constant (Water at 3ft/second)
0.066 Diameter = 0.4 seconds
0.086 Diameter = 0.6 seconds

Self-Heating
> 15mW/°C

Interchangeability
±(0.3°C + 0.005|t|°C),
IEC 751 Class B, above -50°C

Long Term Stability
Better than 0.05°C (0.02% of resistance) per 5 years.
-60°C to 300 °C, 0.25°C per year to 510°C

Insulation Resistance
>50 Megohms at 50VDC at 25&Deg;C

 

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

Recommended Current
1 mA maximum for temperature sensing

Pressure Seal
Moisture proof model 29348 withstands 300psi

Case Material
316 stainless steel on 0.066" diameter

Lead Materials
Stranded or solid copper, plated, imsulated and temperature rated as folows:

  • 34 AWG stranded, silver plated, PTFE Teflon®,
    white, 200°C(390°F) for 0.066 diameter
  • 30 AWG solid, nickel plated, two-wire cable with
    fiberglass over each lead, natural and black
    fiberglass overall, 510°C(950°F) for both sizes

   

Teflon® is a registered trademark of the DuPont Corporation.

Ordering Specifications


   29348    <0.066" diameter x 0.6" long SST with individual 34 AWG PTFE Teflon® leads, 200°C (390°F), Moisture Proof
   29362   <0.066" diameter x 0.6" long SST, 30 AWG cable, fiberglass over each/fiberglass overall, 510°C (950°F)
 
  RESISTANCE SPECIFICATION @ 0°C
     T01   100 Ω ±0.12 Ω (a = 0.00385 Ω/Ω/°C International Grade IEC 751 Class B)
     T10   1000 Ω ±1.2 Ω (a = 0.00385 Ω/Ω/°C International Grade IEC 751 Class B)
 
   LEAD LENGTH in inches (12 inches standard)
 
29348
–
T10
–
12
–  Typical write-up for 29348
29362
–
T01
–
60
–  Typical write-up for 29362

Available now from our Webstore:

High-Temp Insertion Capsule Platinum RTD (0.066 High-Temp Insertion Capsule Platinum RTD (0.066 High-Temp Insertion Capsule Platinum RTD (0.066 High-Temp Insertion Capsule Platinum RTD (0.066 High-Temp Insertion Capsule Platinum RTD (0.066
High-Temp Insertion Capsule Platinum RTD (0.066" dia.) (RdF Model 29362)
from $235.00

These platinum RTD Capsules deliver stable, accurate temperature measurement in environments as hot as 510°C (950°F). Precision ultra-small diameter and low mass result in a super fast response time. Leads are welded and anchored to the element, adding durability. Please contact factory if desired lead length or resistance is not available online.

Moisture-Proof Insertion Capsule Platinum RTD (0.066 Moisture-Proof Insertion Capsule Platinum RTD (0.066 Moisture-Proof Insertion Capsule Platinum RTD (0.066 Moisture-Proof Insertion Capsule Platinum RTD (0.066 Moisture-Proof Insertion Capsule Platinum RTD (0.066 Moisture-Proof Insertion Capsule Platinum RTD (0.066 Moisture-Proof Insertion Capsule Platinum RTD (0.066 Moisture-Proof Insertion Capsule Platinum RTD (0.066
Moisture-Proof Insertion Capsule Platinum RTD (0.066" dia.) (RdF Model 29348)
from $165.00

Moisture-proof platinum RTD Capsules deliver stable, accurate temperature measurement in wet environments up to 300psi. Precision ultra-small diameter and low mass result in a super fast response time. Leads are welded and anchored to the element, adding durability.