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SPL/45-94117B page 2 of 4
8-7/16 in.
(214 mm)
3-3/8 in.
(86 mm)
7-7/8 in.
(200 mm)
3-15/16 in.
(100 mm)
4-1/32 in.
(102 mm)
9/32 in.
(7 mm) dia.
3 places
*
SPLCE, SPLBPE, 45TEE and 45TEBPE versions feature square case,
but altered to fit standard round panel mounting–not pictured.
1/2 in.
(13 mm)
conduit
120
120
120
5-7/16 in.
(138 mm)
2-57/64 in.
(73 mm)
1/4 in. (6 mm) dia.
holes (3 places.) on
5-13/64 in. (132 mm)
b.c. (bolt circle),
120 apart, clocking
as shown
Mounting Hole
4-3/4 in.
(121 mm)
diameter.
Optional
1/2 NPT
conduit
connector
(std. with
-OS option).
7 in.
(178 mm)
1/2 NPT
Compression Nut
Bulb Minimum Insertion
Ranges and Accuracy — Sensing Bulb Insertion
Dimensions
Surface Mount Models
*
Sensing Bulb
Panel Mount Models
Temperature Ranges Available (dual scale dials)
Fahrenheit Celsius
Accuracy (SPL and 45 Series Models)
Lower 1/4 Middle 1/2 Upper 1/4
15° to 250°F 9° to 121°C ±8°F/±4°C ±2°F/±1°C ±2°F/±1°C 5 in. (127 mm)
130° to 350°F 60° to 180°C ±8°F/±4°C ±2°F/±1°C ±3°F/±1.5°C 2-1/2 in. (64 mm)
260° to 450°F 127° to 232°C ±8°F/±4°C ±2°F/±1°C ±3°F/±1.5°C 2-1/2 in. (64 mm)
Minimum Sensing Bulb
Insertion into Process
Using a Thermowell Start-Up Lockout
Start Up Lockout
Toggle Switch
SPLC Series
Low Limit
Contact
TEMPERATURE
MURPHY
SWICHGAGE®
TULSA, U.S.A.
27
0
250
220
200
170
350
340
320
300
29
0
°C
°F
START
RUN
Red
Toggle
switch
White
Black
SPLC
The SPLC SWICHGAGE
®
low limit contact can be bypassed for equipment
start up. A toggle switch is provided for this purpose. The toggle switch must be
manually reset when temperature rises above the low limit.
Installing a thermowell is rec-
ommended for high pressure
applications or corrosive envi-
ronments. It also allows sens-
ing bulbs to be changed or
adjusted without opening the
connection to process.
Murphy offer thermowells for
a variety of applications.
For details see Murphy
bulletin T-9003B.
Sensing Bulb
Active Section
Thermowell
into the Process
Capillary
Tube
Application