RTDs / Probe RTDs : Pressure Fail-Safe

RTD PROBES WITH HIGH PRESSURE SEAL

PNs 22314, 22421

Safety Under Pressure

RdF fail-safe pressure sealed RTD probes are the right choice for pipeline, boiler or other pressure vessel applications.

Safely contain flammable gases and fluids up to 1500 PSI whenever a probe or thermowell is damaged or severed.
The pressure seal protects personnel and equipment.

Performance Specifications

   
 

Temperature Range
-50°C to 260°C (-60°F to 500°F)
-50°C to 232°C (450°F) if lead wires may become wet

Sensing Element
International Grade Thin Film Platinum,
α = 0.00385 Ω/Ω/°C per IEC 751.

Ice Point Resistance
100 ± 0.12 Ω, 1000 ± 1.20 Ω

Time Constant of Model 22314
3.1 seconds nominal in water flowing at 3 ft/second

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

Excitation Current
1 mA (maximum recommended)

Pressure Rating
1500 PSI at welded header boundary

Moisture Seal
Leads sealed against shallow immersion

Vibration
Sinusoidal: 20 Hz to 2kHz 80g

Case Material
300 Series Steel

Lead Materials
22 AWG TFE Teflon® insulated, nickel plated stranded copper.
Lengths over 3 feet are cable
22 AWG (2-wire) or 24 AWG (3-wire) FEP Teflon® insulated.
Optional armor is square loc stainless steel

   

Teflon® is a registered trademark of the DuPont Corporation.

Dimentional Drawing

Ordering Specifications

22314
22421 		1/4" Dia 300 Series SST Sheathed Rigid RTD Probe Assembly, hex fitting with fail-safe pressure seal.
1/4" Dia 300 Series SST Sheathed Spring Loaded RTD Probe Assembly with fail-safe pressure seal.
 
    RTD RESISTANCE SPECIFICATION (Ohms @ 0°C)
T01
T10
 100 ±0.12 (α = 0.00385 Ω/Ω/°C) thin film, IEC 751
1000 ±1.2 (α = 0.00385 Ω/Ω/°C) thin film, IEC 751
 
   PROBE LENGTH - See Drawings
 "L" For 22314, specify probe length in inches.
For 22421, specify thermowell insertion length “A” (bore length) in inches
 
   PROBE LAG HARDWARE - Stainless Steel (22421 only)
A
FX 		Stainless steel hex nipple (Standard)
(Union/nipple extension), specify min. 3" plus 1" increments to 12" max.
 
    CONNECTION HEAD
D
K
S
T 		Without connection head
DIN B cast aluminum (up to 200°F ambient)
Other per sales order
Transmitter (specify or supply with connection head)
(See X-2910 datasheet)
   LEAD WIRE CONFIGURATION
A
B
X2
AX2
X3
AX3 		Single element, 2 wires 36" or under in length
Single element, 3 wires 36" or under in length
Single element, 2-wire cable over 36"
Adds stainless steel armor excluding last 5"
Single element, 3-wire cable over 36"
Adds stainless steel armor excluding last 5"
 
     LEADWIRE LENGTH
     ( ) Specify in inches
22421
–
T01
–
12
–
F4
–
D
–
A
–
12
  Typical Write-up