Tilt Switches and Control Units 11/7/01 3:36 PM Page 1 Senses and Controls Solid & Liquid Levels PRO-LINE Tilt Switches and Control Units Heavy-Duty 2” Probe Light-Weight Heavy-Duty Model 20-32 (Plastic) Probe Standard Probe Model 20-31 Model 20-39 Model 21-39 Stainless Steel Control Unit Probe Float Ball Model 20-43 Model 20-30-SS Accessory cuit in the control unit prevents momen- • Rugged, abrasion-resistant tilt • Conveyor belt misalignment detector. switch. • Level control in volumetric batching. tary tilting of the switch from causing a false or premature contact transfer. An • Simple installation. • Crash probe for tripper car. • Control unit is solid state, printed • Starvation or no-flow detector for belt internal jump wire permits selection of "Normal" condition either with the tilt circuit board construction. and vibratory feeders. • Adjustable time delay to 10 sec- switch vertical or tilted. Two normally- The Pro-Line tilt switch is actuated when open and two normally-closed output onds - Prevents false trips. material rises to tilt the probe 15 • Control unit standard NEMA 4X contacts are available for connection to degrees or more from its vertical posi- external alarms and/or controls. enclosure (Model 20-43) or without tion. The mercury switch is precisely enclosure (Model 20-43-1) for Interruption of line power causes a relay positioned so that, regardless of direc- transfer. control panel mounting. tion of tilt, the normally-closed contacts • Performance proven in thousands of are caused to open. The switches are Various probe assemblies are available applications throughout the world. for application with a wide variety of encapsulated in various sizes to suit the • All probes include mounting application. materials and environmental conditions hardware. (see chart on back side for description The Model 20-43 control unit is APPLICATIONS of available probe assemblies.) The housed in a NEMA 4X box with green control unit is also available without • High level detector in bins and vessels ("Normal") and red ("Alarm") indicating containing a wide variety of materials. enclosure for mounting in other types of lights inside a clear front enclosure. enclosures and control panels (Model • Chute or transfer point plug-up A 0-10 second adjustable time delay cir- detector. 20-43-1.) 501 90th Avenue NW • Minneapolis, MN 55433 Tilt Switches and Control Units 11/7/01 3:36 PM Page 2 SPECIFICATIONS METAL ENCLOSURE PROBES (See Table Below) AVAILABLE Contact Rating: MODEL 20-43 (NEMA 4X) UPON REQUEST ( Model 20-41 ) 4 amperes at 110 VAC. ( All Other Probes ) 1 ampere at 24 VDC, Non-inductive Temperature Rating: MODEL 20-43-1 -25°F - 180° F Standard (Board Only) 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% Dimensions shown in inches and MM (in parenthesis) TILT SWITCH PROBE SELECTION TABLE Overall (Including 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# * Requires Model 20-38 - B - 4 Control ** Requires Model 21-38 Control Accessories include wear paddles, float balls and fins that are easily attached. Standard cable lengths are 25 feet unless otherwise specified. 501 90th Avenue N.W. Minneapolis, MN 55433 (763) 783-2500 FAX: (763) 783-2525 www.thermoramsey.com CERTIFICATION NO. 99-HOU-AQ-8174 Thermo Ramsey Companies in: Australia Italy Spain Canada Mexico The Netherlands Germany South Africa United Kingdom Catalog No. 20.400 (Rev. 9/01) Printed in U.S.A. SP