RdF Corporation
R-21 // INDUSTRIAL RTDs
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Overview of RdF Temperature Sensor Applications
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Overview Performance Specs  Ordering Specs

 21A, C & H  21B  21D  Lag Hardware  Connection Heads
Dimensional Drawing   – 21B
21B
Ordering Specifications   – 21B
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21B 14" Diameter Sheathed Platinum Probe, Rigid Mount to Fitting _
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     RTD RESISTANCE SPECIFICATIONS (Ohms @ 0°C) _
10
11
T01
20
21
T05
T10
102
112
T012
100 ± 0.1 (a = 0.003924 Ω/Ω/°C) RdF Ref. Std.
100 ± 0.1 (a = 0.00385 Ω/Ω/°C) IEC/DIN Std.
100 ± 0.12 (a = 0.00385 Ω/Ω/°C) thin film
200 ± 0.2 (a = 0.003924 Ω/Ω/°C)
200 ± 0.2 (a = 0.00385 Ω/Ω/°C)
500 ± 0.6 (a = 0.00385 Ω/Ω/°C) thin film
1000 ± 1.2 (a = 0.00385 Ω/Ω/°C) thin film
100 ± 0.1 Dual element (a = 0.003924 Ω/Ω/°C)
100 ± 0.1 Dual element (a = 0.00385 Ω/Ω/°C)
100 ± 0.12 Dual element (a = 0.00385 Ω/Ω/°C) thin film
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_     CONNECTION HEAD (see connection head table) _
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_     SERVICE PARAMETER - Sinusoidal Vibration 20Hz to 2kHz _
S
H
Standard construction (25 g wire-wound, 80 g thin film)
Heavy duty construction (up to 50 g) (single wire element only)
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_     PROBE LENGTH _
_ (Specify “L” in inches, >60" requires support) (see photo)
Std. Const: 3" min, Heavy Duty: 4" min.
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_     NUMBER OF LEADS _
A
B
C
D
E
X3
AX3
X4
AX4
Single element, 2 wires any length
Single element, 3 wires 36" or under in length
Single element, 4 wires 36" or under in length
Dual element, 2 wires per element
Dual element, 3 wires per element
Single element, 3 wire cable over 36"
Adds stainless steel armor excluding last 5"
Single element , 4 wire cable over 36"
Adds stainless steel armor excluding last 5"
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_     ARMOR LENGTH
           Specify “X” in inches (ie. A0= no armor,
           A60 = 60 inches) (Single element only)
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    LEAD LENGTH - Specify in inches (4" Standard)
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21B
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11
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D
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S
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6
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B
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A0
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4
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  Typical Write-up for 21B
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