Mineral Insulated RTDs w/ Connection Head
(Series RK3)

RK3 RTD Catalog Page

Ordering Information

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Part No.:

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1
Series		 2
Element
Type		 3
Wire Config		 4
Sheath Diameter		 5 6
Sheath Length		 7
Head Mounting Fitting		 8
Connection Head Style		 9
Special Features		 10
Attached Fitting		 11 12
Insertion Length		 13
Trans Temp Range		 14
Temp Scale
RK3

2 Element Type
K 100 5 DIN 00385 Class A mineral insulated element (600°C rated)
P 100 5 DIN 00385 Class A mineral insulated element (800°C rated)
  For other elements consult factory

3 Wire Configuration
2 2-wire
3 3-wire
4 4-wire
5 2-wire (Dual)
6 3-wire (Dual)

4 Sheath Diameter
H 0.125” (3.2mm) (1/8")
L 0.188” (4.8mm) (3/16")
N 0.250” (6.4mm) (1/4")
  Sizes for reference only (Standard tolerances apply)
  For other diameters consult factory

5 6 Sheath Length
2-144

7 Head Mounting Fitting
06 1/2” npt x 1/2" npt double thread
07 1/2” npt double thread spring loaded
08 1/2” npt x 1/2" npt double threadspring loaded w/ oil seal
09 1/2” npt x 3/4" npt double thread
10 3/4” npt x 3/4" npt double thread
12 Single threaded brass compression (no process thread)
13 Single threaded stainless compression (no process thread)
14 1/2” npt x 1" npt double thread
15 1/2” npt x 1/4" npt double thread
16 1/4” npt x 1/4" npt double thread
17 1/2”npt single thread bushing (no process thread)
18 1/4”npt single thread bushing (no process thread)
  Fittings silver soldered (brazed) to sheath
  For other fittings not shown contact factory

8 Connection Head Style
A Cast aluminum (standard)
B Small cast aluminum
C Flip top head cast aluminum
D Cast steel
E Stainless steel
F Cast iron
G Polypropylene
H Explosion proof cast aluminum
Q Explosion proof 316 Stainless steel
R Explosion proof cast aluminum DUAL conduit
S Mini aluminum screw down cover
W Cast aluminum NEMA 4X IP68 rated

9 Special Features
  None
04 Flat tip probe
17 420 milliamp transmitter (hockey puck style) Non Isolated
53 420 milliamp transmitter (hockey puck style) Isolated
28 90 degree bend
30 45 degree bend

10 Attached Fitting (optional)
  None
F01 1/8" npt single thread
F02 1/4" npt single thread
F03 3/8" npt single thread
F04 1/2" npt single thread
F05 3/4" npt single thread
F06 1/2" npt x 1/2" npt double thread
F07 1/2" npt double thread. Spring loaded
F08 1/2" npt x 1/2" npt double thread. Spring loaded w/ oil seal
F09 1/2" npt x 3/4" npt double thread
F10 3/4" npt x 3/4" npt double thread
F11 Fixed bayonet cap assembly
F15 1" npt single thread
F16 Adjustable 7/16" ID bayonet cap fitting (1/8" OD & 3mm OD)
F17 Adjustable 12.5mm ID double slot bayonet cap fitting (1/8" OD & 3mm OD)
F18 1/8" npt compression fitting (Brass)
F19 1/8" npt compression fitting (Stainless Steel)
F20 1/4" npt compression fitting (Brass)
F21 1/4" npt compression fitting (Stainless Steel)
F22 1/2" npt compression fitting (Brass)
F23 1/2" npt compression fitting (Stainless Steel)
  For other fittings not shown contact factory

11 12 Insertion Length (when required)
  None
0-60


For Transmitter Only (Optional)

13 Transmitter Temperature Range
  None
1-1200
-

14 Transmitter Temperature Scale
  None
F Farenheit
C Celsius