Dry Bulk Material Handling


Ramsey Switches


Gerrard & Associates is a worldwide distributor of Thermo Scientific's complete line of Ramsey Switches.


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Thermo Scientific Ramsey Belt Misalignment Switch (Runoff Switch)

  • Used to monitor the position and tracking of conveyor belts
  • Mounts on the conveyor structure and adjusts so the roller arm is the proper distance and angle from the outside edge of the belt
  • When a belt drifts out of alignment it contacts the roller actuator arm which rotates the actuation shaft, causing the belt misalignment switch to send an alarm signal
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Thermo Scientific Ramsey Tilt Switchs & Controls (Mercury )


  • Actuated at 15 deg. from its vertical position due to marterial rise or plugged chute conditions
  • Used for stacker reclaimers, radial stackers, high level for bins, vessels, high pile detector, and plugged chute applications.
  • Availiable in standard rating and Class I & II, Fm Approved (X-Proof). Tilt switch controls available for standard and Class I & II, Fm Approved (X-Proof).
  • (2) normally-open and normally-closed output
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Thermo Scientific Ramsey Tripper Position Switch

  • Heavy-duty limit switch
  • Often used to indicate the position of a tripper on a conveyor with multiple discharge points
  • Can be used anywhere an extremely heavy duty limit switch with physical activation is needed
Agency Approvals: Models with CSA approval for Class II, division 1 & 2, groups E, F, and G are available
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Thermo Scientific Ramsey GTR 130 Flow/No-Flow

  • Optimizes the efficient use of machinery and energy by switching process equipment on or off as required
  • It has no moving mechanical parts, which eliminates wear and makes the instrument maintenance and trouble-free
  • Its positive effect on plant efficiency quickly outweighs the investment

Recommended Equipment Applications

  • Volumetric feeders
  • Silo discharge
  • Mechanical conveyors
  • Dryers, screeners, classifiers, mills
  • Pneumatic conveyors and injectors
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Thermo Scientific Ramsey Series 60-200 Motion Monitor System


  • Start-up delay: 0-99 seconds
  • Alarm setpoint(s): 0-160%
  • Alarm Delay: 0-99 seconds
  • Restart mode: power-up, remote relay input
  • Begin start-up delay: power-up, first pulse
  • Alarm reset: manual (latched), automatic
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    Thermo Scientific Ramsey Safety Cable Pull Switch (Pull Cord Switch)

    • Used as an emergency shutdown device for conveyors or other equipment
    • Meets OSHA and MSHA requirements for safety shutdown devices
    • Safety pull cables are attached to the actuating arm of the switch
    • When force is applied to the pull cable it rotates the actuating arm and actuating shaft
    • At a 20� rotation the switch enters a tripped and locked position
    • The actuating shaft has two cams inside the housing; each cam simultaneously actuates an independent SPDT micro-switch for shutdown and alarm signals
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    Thermo Scientific Ramsey Mercury-Free Tilt Sensor
    • Advanced technology inside the tilt probe replicates performance found in traditional mercury-based Thermo Scientific Ramsey Tilt Rugged, abrasion resistant tilt probes
    • Advanced probe opto-electronics prevent jitter and chatter
    • All probes include mounting hardware
    • User adjustable time delay to prevent false alarms
    • User settable normal/alarm conditions
    • Probe fault indication
    • LED status lights ? no bulbs to change
    Includes: �

    Certifications: CSA, CE
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    Thermo Scientific Ramsey DTR 131Flow/No-Flow detector
    • detects and monitors low/no-flow conditions of bulk solids in pipelines, ducts and air-slides and at transfer points of chutes, conveyor.
    • Low-cost, non-invasive, microwave-based 
    • real-time flow information allows you to monitor processes closely
    • leads to increased reliability, higher quality end product, reduced downtime and fewer hazards to jeopardize operators and equipment.
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    Thermo Scientific Ramsey Model 60-23P Under Speed Switch


    • Non-contacting, proximity-type detector provides longer life and lower operating costs
    • Two-bolt mounting assures simple installation
    • Single piece construction with no separate control unit
    • Easy to set up and/or troubleshoot
    • 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 setpoint

    Recommended for: Conveyor belts, bucket elevators and other types of rotating equipment and also used for industrial applications
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    Thermo Scientific Ramsey Microwave Point Level Detector

    • It is a totally noncontacting instrument with a range from 10cm (4  in.) minimum to 150m (492  ft.)maximum
    • Each unit is protected from the process by a polyethylene,ceramic or tempered safety sight glass window
    • The switch is a safe and environment-friendly replacement for nucleonic switches
    • Recommended for: Pressurized coal down comers, electro-static precipitator hoppers, and in fly ash, clinker and coal transfer chutes