RdF Corporation
R-21 // INDUSTRIAL RTDs
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Overview Performance Specs  Ordering Specs

 21A, C & H  21B  21D  Lag Hardware  Connection Heads
Dimensional Drawing  – 21A, C & H
21A, 21C
Ordering Specifications  – 21A, C & H
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_ 21A/C/H
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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
*Not Available on 21H
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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)
_     PROBE LENGTH
  (Specify “L” in inches) Std. Const: 3" minimum, Heavy Duly: 3" minimum for 21H,
4" minimum for 21A & 21C (see drawings)
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_      NUMBER OF LEADS
A
 B*

C
D
E
Single element, 2 wires, any length
Single element, 3 wires, (36" or under on 21A),
*21H requires B cable, any length, STD.
Single element, 4 wires, (36" or under on 21A)
Dual element, 2 wires per element
Dual element, 3 wires per element, 21A only.
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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 - N/A to 21C _
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21A
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10
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S
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4
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B
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A0
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60
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  Typical Write-Up for 21A
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