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Ramsey™ Conveyor Protection Switches

Protect your equipment, prevent accidents and reduce unscheduled shutdowns with the Thermo Scientific™ Ramsey™ Conveyor Protection Switches. The Belt Misalignment Switch (Run Off Switch) and Safety Cable Pull Switch (Pull Cord Switch) are now available with network addressable modules. Ramsey conveyor safety switches also include the Tripper Position Switch. All are used for position information, control signals, and to identify potentially hazardous situations with your process equipment. They utilize a rugged, heavy-duty design and are built to last.
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Actuating Force (ROS)           5 lb.
                                              Adjustable actuator angle increment 22.5°

Description                             Conveyor Protection Switches

Enclosure Rating                   SAS NEMA Type-4X: Yellow poly enamel painted                                                            aluminum
                                              SAS Nickel Plated NEMA Type-4X: Nickel plated aluminum

Outputs                                 SAS NEMA Type-4X: 2 or 4 SPDT contacts rated for 6A                                                  @ 250 VAC
                                              SAS Nickel Plated NEMA Type-4X: 2 or 4 SPDT contacts                                                  rated for 6A @ 250 VA

Pull Force Rating (SPS)        3.63 - 8.16kg (8 - 18 lb.)

                                              Pull cord lock angle: 15°

Spacing (SPS)                       SAS NEMA Type-4X: 45.7m (150 ft) spacing between pull                                               cord switches
                                             SAS Nickel Plated NEMA Type-4X: 45.7m (150 ft) spacing                                               between pull cord switches

Temperature Range             Operating temperature: -40°C to +85°C (-40°F to                                                        +185°F)

Unit Size                               Each

Ramsey™ Mercury-Free Tilt Sensor

Prevent jitter and provide stability in your hazardous area applications with the Thermo Scienitifc™ Ramsey™ Mercury-Free Tilt Sensor. This sensor uses advanced technology inside the tilt probe to replicate the same performance found in traditional mercury-based Thermo Scientific Ramsey Tilt Sensor Switches.
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Alarm Contact Rating            Controllers: 20-35-NM-DIN: (1) NO—2 Amp @                                                              115/230VAC, 3 Amp @ 24VDC; All other models: (2)                                                      SPDT  —10 Amp @ 115/230VAC, 7 Amp @ 30VDC non-                                                  inductive

Certifications/Compliance    Tilt Sensor and Controllers: All models: cCSAus, CE

Description                            Mercury-Free Tilt Sensor

Fault Contact Rating             Controllers: All models: (1) NO—rated for 2 Amp @

Input Power                           Controllers: All models: 115/230 VAC, 50/6 0Hz

Mounting Hardware              Tilt Sensor: All models: Hanger and two S-hooks included

Protection                               Tilt Sensor: All models: IP67, NEMA-4X; Controllers: 20-                                                35-NM-DIN: IP20 (NEMA 1); All other models: IP65                                                        (NEMA 4 or NEMA 4X)

Temperature Range              Controllers: All models: -40° to +50°C (-40° to +122°F)

Temperature Rating              Controllers: All models: -40° to +50°C (-40° to +122°F)

Time Delay                             Controllers: All models: 1, 2, 4 or 6 seconds selectable by                                                jumpers

Unit Size                                Each

Ramsey™ 60-12 Digital Belt Speed Sensor

Monitor conveyor belt scale speed in demanding bulk material handling applications with the highly reliable and accurate Thermo Scientific™ Ramsey™ 60-12 Digital Belt Speed Sensor. Direct-coupling the sensor to the conveyor tail pulley, snubbing roll, or large diameter return roller ensures accurate belt-travel readout. No wheels ride on the belt, eliminating problems related to material build-up and slippage. The sensor element uses a brushless, pulse generator to produce a stream of pulses, each representing a unit of belt travel. The pulse stream frequency is proportional to true belt speed.
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Models 60-12C, F, G and ENC Speed Sensors must be attached to a pulley shaft which turns at true conveyor belt speed. Normally, the tail pulley shaft or a snubbing roll shaft satisfies this requirement. In installations where the tail pulley or snubbing roll shaft is not accessible, an additional pulley must be installed specifically for the speed sensor.

  • 60-12C is used for speeds from 20 to 200 RPM and supplies the output of the generator directly to the totalizer for high speed operation

  • 60-12F is used for speeds from 3 to 30 RPM

  • 60-12G is used for speeds from 10 to 200 RPM

  • 60-12ENC is used for speeds 0 to 200 RPM and has a 500 pulse per revolution encoder inside, typically is used on slow RPM applications

Ramsey™ Model 60-23P Under Speed Switch

Monitor the rotational velocity of a shaft or other rotating equipment within your industrial applications with the Thermo Scientific™ Ramsey™ Model 60-23P Under Speed Switch. The Ramsey Model 60-23P Under Speed Switch is single-piece construction with no separate control unit. It is ideally suited for a wide variety of industrial applications where the need to monitor under speed or slippage conditions exist.
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The Ramsey Model 60-23P Under Speed Switch Features:

  • Non-contacting, proximity-type detector, which provides longer life and lower operating costs

  • Two-bolt mounting for simple installation

  • Single piece construction with no separate control unit

  • Easy setup and troubleshooting

  • Rugged housing: weather-tight, polyammide/fiberglass, sturdy, lightweight

  • No moving parts and longer trouble-free life

  • Alarm/delay: 10-second delay while rotating equipment reaches operating speed

  • Alarm to normal delay assures notification when speed drops below adjustable set point