Watlow RT Style Data sheet
105
WATLOW
®
Resistance Temperature Sensors
RTDs
Connection Head/Optional Transmitter
Style RR
L
Single
Threaded
Fitting
L
Double
Threaded
Fitting
Sheath O.D. (in.)
G = 0.125
H = 0.188
J = 0.250
Ordering Information
RR
Part Number
Sheath
O.D. (in.)
Con.
Head
Head
Mtg.
Fittings
Sheath
Const.
Sheath
Length
“L” (in.)
Sheath
Length “L”
(fract. in.)
③
⑤④⑥
⑦
⑧⑨
⑩
②①
Element
Initial
Element
Accuracy
Sheath Construction
-58 to 500°F
(-50 to 260°C)
316 SS
-328 to 1200°F
(-200 to 650°C)
316 SS
Standard industrial
0.125 - 0.250 in. O.D.)
A —
Mineral insulated
(0.125 - 0.250 in. O.D.)
— K
③
Sheath Length “L” (in.)
Whole inches: 02 to 99; for metric lengths and lengths over
99 inches contact the factory.
⑧
⑨
⑪
⑬
⑭
⑮
⑫
0
0
Head Mounting Fittings
O = Single threaded, 303 SS
F = Double threaded, 303 SS 1⁄2 in. NPT
H* = Spring loaded, double threaded, 316 SS 1⁄2 in. NPT
* Available in 0.250 inch diameter only.
⑤
⑦
Element
2-Wire 3-Wire 4-Wire
100Ω single A B C
100Ω dual *, ** D E —
1000Ω single ** J K L
* Available in 0.250 inch diameter only.
** Available with standard industrial construction only.
⑪
Features and Benefits
Connection heads
• Provides superior dust and moisture resistance
Weatherproof plastic heads
• Resists weak acids, organic solvents, alkalies, sunlight
and dust
Connection Head
C =
Polypropylene
D =
Cast iron
E =
Cast aluminum
H =
Explosion proof
U* =
E head with 5750 transmitter
V* =
C head with 5750 transmitter
W* =
H head with 5750 transmitter
* For units with transmitter, the order must specify a range and degree
F or C, as well as a temperature span.
④
Sheath Length “L” (fractional in.)
0 =
No fraction, whole inches
1 =
1
⁄8
2 =
1
⁄4
3 =
3
⁄8
4 =
1
⁄2
5 =
5
⁄8
6 =
3
⁄4
7 =7⁄
8
⑩
Complete assembly available
• Head-mounted 4-20mA transmitter, three- or four-wire
input and non-isolated
00
Initial Element Accuracy @ 0°C
A =
DIN Class A (±0.06%)
B =
DIN Class B
(±0.12%)
⑫
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