RdF Corporation
R-23 // INDUSTRIAL RTDs
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Overview Performance Specs Ordering Specs   
  Dimensional Drawing
Type 23A – Straight Probe Assembly
Type 23A
Type 23B – Rigid Probe Assembly with Hex Fitting
Type 23B
 
Ordering Specifications
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_ 23A
23B		 _ 1/4" Dia. straight probe, 316 stainless steel
1/4" Dia. probe with rigid 1/2 - 14 NPT stainless hex fitting
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_     RTD RESISTANCE SPECIFICATIONS (Ohms @ 0°C)
_ T01
T10
H10		 100 ± 0.12 (a = 0.00385 Ω/Ω/°C) thin film, IEC751
1000 ± 1.2 (a = 0.00385 Ω/Ω/°C) thin film, IEC751
1000 ± 1.2 (a = 0.00375 Ω/Ω/°C) thin film, Industrial
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_       CONNECTION HEAD – 23B Only (see table)
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_       PROBE LENGTH (specify “L” in inches) (see drawings)
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_  LEAD WIRE CONFIGURATION
A
B
C
X3
X4		 Single element, 2 wires any length
Single element, 3 wires 36" or under in length
Single element, 4 wires 36" or under in length
Single element, 3 wire cable over 36"
Single element, 4 wire cable over 36"
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_   ARMOR LENGTH (21A only)
             Specify “X” in inches (ie. A0 = no armor, A60 = 60 inches)
             (Single element only)
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_     LEAD LENGTH (specify in inches)
    (12" standard on 23A)
    (4" standard on 23B)		 _
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23A
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T01
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8
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B
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A60
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12
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–  Typical write-up for 23A
23B
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T10
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A
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8
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A
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A0
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4
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–  Typical write-up for 23B
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Dimensional Drawing
Type 23D – Spring Loaded Probe Assembly
Type 23D
Ordering Specifications
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23D 1/4" Dia. Spring Loaded Stainless Hex Probe Assembly _
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_ _     RTD RESISTANCE SPECIFICATION (Ohms @ 0°C) _
T01
T10
H10
 100 ± 0.12 (a = 0.00385 Ω/Ω/°C) thin film, IEC751
1000 ± 1.2 (a = 0.00385 Ω/Ω/°C) thin film, IEC751
1000 ± 1.2 (a = 0.00375 Ω/Ω/°C) thin film, Industrial
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_    PROBE LENGTH IN THERMOWELL
   ( “A” bore depth in inches, see drawing)		 _
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_    PROBE LAG HARDWARE 1/2 x 1/2 NPT _
A
*
GX

HX

JX

KX		 Hex nipple is 3/4" long stainless*, specify as “A” (standard)
Other stainlesss hardware, see Data Sheet R-21
(Coupling/nipple extension), black iron,
specify x = min. 3" plus 1" increments
(Union/nipple extension), black iron,
specify x = min. 3" plus 1" increments
(Close nipple, galvanized unsealed parting coupling, nipple extension), black iron,
specify x = minimum 1 1/2" + 1" increments (shortest “union”)
(Straight nipple), black iron, specify x = 1/8", 1/2", 1", + 1" increments (CREDIT)
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_    CONNECTION HEAD (see table below) _
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_ _    LEAD WIRE CONFIGURATION _
A
B
C
X3
X4		 Single element, 2 wires any length
Single element, 3 wires 36" or under in length
Single element, 4 wires 36" or under in length
Single element, 3 wire cable over 36"
Single element, 4 wire cable over 36"
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_ _    LEAD LENGTH (specify in inches)
   (4" standard)		 _
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23D
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–
T01
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6
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G3
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J
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B
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4
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–   Typical write-up for 23D
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Connection Heads with Terminals
  NEMA 4 w/gasket Conduit Max. Temp
A  Small cast aluminum head 1/2 NPT 125°C
C  Cast Iron head 3/4 NPT 260°C
D  For no connection head specify “D” - -
E  Large cast aluminum head 3/4 NPT 260°C
F  Economy conduit body 1/2 NPT 125°C
I  Hinged plastic 3/4 NPT 125°C
J  Hinged cast aluminum 3/4 NPT 125°C
K  Din B cast aluminum 1/2 NPT 100°C
S  Other (please specify when ordering) - -
T  Transmitter, specify or supply w/head - -

 
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