Series 22: Explosion Proof Platinum RTD Probes

22B, 22D

TYPE 22B

RIGID PROBE ASSEMBLIES WITH HEX FITTING

1/4” diameter sheath, available in 316 stainless steel or Inconel
welded to threaded hex fitting for connection head assembly. Operating ranges: –320°F to 900°F for stainless steel and up to 1200°F for Inconel. Teflon® insulated lead wires. single or dual elements; Reference or IEC/DIN R vs. T characteristics and 2, 3, 4 wire element configurations.

TYPE 22D

SPRING - LOADED PROBE ASSEMBLIES

1/4” diameter sheath, available in 316 stainless steel or Onconel; operating ranges: –320°F to 900°F for stainless steel and up to 1200°F for Inconel. RdF’s fail-safe spring-load firs all applications world-wide.single or dual elements.
Reference or IEC/DIN R vs. T characteristics and 2, 3, or 4 wire element configurations.

Thermowell must be specified for this probe.

For more information, visit our Accessories page.

Features
FM and CSA listed
Stainless steel fittings
Stainless steel or aluminum lag unions
TIG welded construction
Cast aluminum heads
Inconel or stainless steel sheaths
Single or dual elements
Leads per element:2, 3, or 4

Calibrations
Traceable to Nist
R vs. T table for each RTD(at added cost)

Thermowells & Connection Heads
11 approved configurations(see Data sheet T-WELLS )

Operating Temperature Range
-196°C to 480°C (-320°F to 900 °F) Stainless sheath
-196°C to 649°C (-320°F to 1200°F) Inconel sheath
-50°C to 480°C (-60°F to 900°F) thin films in
stainless sheath
Leadwire exit temperature: 260°C(500°F)

Element Resistance:Ohms
100.0 ± 0.1 @ 0°C (32°F)
100.0 ± 0.12 @ 0°C (32°F) Thin Film
200.0 ± 0.2 @ 0°C (32°F)
500.0 ± 0.6 @ 0°C (32°F) Thin Film
1000.0 ± 1.2 @ 0°C (32°F) Thin Film

Temperature Coefficients
0.003924 Ω/Ω/°C (reference grade), 0.003850 Ω/Ω/°C (IEC/DIN grade)

Accuracy
0.25°C @ 0°C (32°F)
0.3°C @ 0°C (32°F) on IEC/DIN thin films

Stability
Less than 0.05°C shift per year full span on wire elements,
–50°C to 300°C (–60°F to 575°F) span on thin films

Response Time of Model 22B
Less than 6 seconds in water flowing at 3 ft. per second

Vibration
Sinusoidal 20Hz to 2kHz
Wire Element: 25g standard, 50g heavy duty construction
Thin Film: 80g standard construction

Self Heating
35 milliwatt/°F in water @ 3 ft/sec.

Recommended Current
1 mA maximum

Insulation Resistance
500 MegOhms minimum @ 100VDC @ 25°C (77°F)

Pressure Rating
3000 PSI

Lead Material
22 AWG nickel-plated stranded copper, TFE Teflon® Insulated

Teflon® is a registered trademark of the DuPont Corporation.

Performance Specifications

RdF explosion proof assemblies are approved for installations in Class I Div.1 Groups B, C, D; Class II Div. 1 Groups E, F, G; and Class III hazardous locations. The spring-loaded or fixed sheathed platinum RTD units suit applications worldwide. Multiple standard options enable the user to customize a configuration for new or replacement applications. RdF’s superior proprietory stainless steel spring-load ensures fail-safe thermal contact while preventing any sheath rotation during vibration.

Three basic styles of construction:
(1) Fixed sheath (2) Spring-loaded sheath (3) Spring-loaded sheath with lagging.
Detailed dimensions for thermowells are here.

Ordering Specifications

22B
22D

Rigid Explosion Proof Platinum RTD Assembly with Connection Head
Spring-Loaded Explosion Proof Platinum RTD Assembly with Connection Head

RTD Resistance Specification (ohms @ O°C)

10
11
T01
20
21
T05
T10
102
112
T012

100
100
100
200
200
500
1000
100
100
100

± 0.1
± 0.1
± 0.12
± 0.2
± 0.2
± 0.6
± 1.2
± 0.1
± 0.1
± 0.12

(α = 0.003924 Ω/Ω/°C) Reference Standard
(α = 0.00385 Ω/Ω/°C) IEC/DIN Standard
(α = 0.00385 Ω/Ω/°C) Thin Film
(α = 0.003924 Ω/Ω/°C)
(α = 0.00385 Ω/Ω/°C)
(α = 0.00385 Ω/Ω/°C) Thin Film
(α = 0.00385 Ω/Ω/°C) Thin Film
(α = 0.003924 Ω/Ω/°C) Dual Element
(α = 0.00385 Ω/Ω/°C) Dual Element
(α= 0.00385 Ω/Ω/°C) Thin Film, Dual Element

4 Sheath Diameter 1/4" only

S Sheath Material – S = 316 SS (Thin Film in S only), I = Inconel

Service Parameter – Sinusoidal Vibration 20Hz to 2kHz

S
H

Standard construction (25g wire-wound, 80g thin film)
Heavy duty construction (up to 50g) (Single Wire Element Only)

Probe Length 22B – “L” in inches - see drawing
(3" min., 4" min. on heavy duty construction)
Stem Length 22D – “A” in inches - see drawing
(2" min., 3" min. on heavy duty, X + A = 24" max.)

Number of Leads

A
B
C
D
E

Single element, 2 wires
Single element, 3 wires
Single element, 4 wires
Dual element, 2 wires per element
Dual element, 3 wires per element

Lead Length in Inches (4" STD.)

Connection Head

G

Explosion proof cast aluminum
(up to 250°F ambient)

H

Explosion proof cast aluminum
(up to 500°F ambient)

X

Explosion proof cast aluminum (up to 250°F)
order separately with transmitter (4 to 20 mA)

Lag Hardware (22D Only), 1/2 NPT, Stainless or noted.
A	Hex Nipple is 3/4" long Specify as “A” (standard)
BX	(Straight Nipple), Specify X=3", 6", 9", or 12" max.
EX	(Aluminum Union/Nipple Extension), Specify X=min. 3" + 1" increments to 12" max.
FX	Same as EX (Stainless Steel Union)


	22B

–


	10

–


	4

–


	I

–


	S

–


	6

–


	B

–


	4

–


	G

—

–

Typical write-up for 22B


	22D

–


	11

–


	4

–


	S

–


	H

–


	8

–


	C

–


	4

–


	H

–


	B3

–

Typical write-up for 22D

RTDs / Probe RTDs : Series 22