20-39 tilt switch

Rugged, abrasion-resistant tilt switch.
Simple installation.
Control unit is solid state, printed circuit board construction.
Adjustable time delay to 10 seconds
- Prevents false trips.
Control unit standard NEMA 4X
enclosure (Model 20-43) or without
enclosure (Model 20-43-1) for control panel mounting.
 Performance proven in thousands of applications throughout the world.
All probes include mounting hardware.
APPLICATIONS
High level detector in bins and vessels containing a wide variety of materials.
 Chute or transfer point plug-up detector.

Conveyor belt misalignment detector.
 Level control in volumetric batching.
Crash probe for tripper car.
Starvation or no-flow detector for belt and vibratory feeders.
The Pro-Line tilt switch is actuated when material rises to tilt the probe 15 degrees or more from its vertical position.
The mercury switch is precisely positioned so that, regardless of direction of tilt, the normally-closed contacts are caused to open. The switches are encapsulated in various sizes to suit the application.
The Model 20-43 control unit is housed in a NEMA 4X box with green ("Normal") and red ("Alarm") indicating lights inside a clear front enclosure.
A 0-10 second adjustable time delay circuit in the control unit prevents momentary tilting of the switch from causing a false or premature contact transfer. An internal jump wire permits selection of "Normal" condition either with the tilt switch vertical or tilted. Two normallyopen and two normally-closed output contacts are available for connection to external alarms and/or controls.
Interruption of line power causes a relay transfer.
Various probe assemblies are available for application with a wide variety of materials and environmental conditions
The control unit is also available without enclosure for mounting in other types of enclosures and control panels

PROBES
Contact Rating:
( Model 20-41 ) 4 amperes at 110 VAC.
( All Other Probes ) 1 ampere at 24 VDC,
Non-inductive
Temperature Rating:
-25°F - 180° F Standard
180°F - 390° F Special (20-39 C Series)
Below -25°F (20-39 B Series)
CONTROL UNIT (See Drawing)
Relay Contact Rating:
10 amperes at 115 VAC, non-inductive
( DPDT Contact Agreement )
Time Delay:
0-10 seconds, adjustable
Temperature Rating:
-40° F - +158° F
-40° C - +70° C
Case Size:
( Model 20-43 )
6.89" High x 4.92" Wide x 3.90" Deep
Printed Circuit Board Size:
( Model 20-43-1 ) 5.95" High x 4.4" Wide
Circuitry:
Selection of vertical or tilted probe position
for "normal" condition
Power Requirements:
20-43, 20-38 (metal box) are available in 110
or 220 VAC versions, 50/60Hz ±10%

Model No. Description Finish Length Diameter Hanger Assembly) Weight
20-39 Standard Probe Nickel Chrome 8 1/4" 1 1/4" 2 1/2" 1.5#
20-31 Light-Weight, 1" Plastic Probe PVC 9" 1" 2" 0.5#
20-32 Heavy-Duty, 2" Probe Acrylic Enamel 10" 2" 4" 8#
20-33 Buoyant, Plastic Slurry Probe PVC 19" 1" 1" 1#
20-30-SS Stainless Steel Probe 304 SS 10 1/4" 1" 2" 1#
20-39B *Low-Temp. (Below -25° F) Nickel Chrome 8 1/4" 1 1/4" 2 1/2" 1.5#
20-39C Hi-Temp. (180-390° F) Nickel Chrome 8 1/4" 1 1/4" 2 1/2" 1.5#
21-39 **Class I & II, FM Approved Nickel Chrome 8 1/4" 1 1/4" 2 1/2" 1.5#
20-41 Standard Probe, 110 VAC Nickel Chrome 8 1/4" 1 1/4" 2 1/2" 1.5#
20-41-SS Stainless Probe, 110 VAC 304 SS 10 1/4" 1" 2" 1#