Thermo scientific pro line overview - sales training

Thermo Scientific
Bulk Weighing & Monitoring
Pro-Line Products

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Pro-Line Products
• We provide products for the bulk material handling industry
• Some of our products are typically sold through distributors
• Categorized as Pro-Line products, including:
• Conveyor Accessories
• Belt Misalignment Switch, Safety Cable Pull Switch, Tripper Position Switch
• Motion Monitor
• 60-23P Under Speed Switch
• DTR Flow/No-Flow Switch
• Point Level (Detects material at one place)
• Tilt Switch
• Capacitance Level Switch
• Rotary Level Switch
• Microwave Point Level
• Continuous Level (Measures how much material is there)
• C-Level
• BOB II
Property of Thermo Fisher Scientific

3
Conveyor Accessories – Belt Misalignment Switch
• Belt Misalignment Switch is used to notify operators and/or shut down
a conveyor when a conveyor belt tracks too far off center
• (2) SPDT micro-switches
• (1) SPDT switch actuates at 10° for alarm condition
• (1) SPDT switch actuates at 20° for conveyor shutdown
• Actuator arm is adjustable for 360° in 22.5° increments
on the splined shaft
• Dual roller bearings in actuator roller arm are rated for
5000 RPM or 1250 FPM belt speed. Rollers will handle
higher speeds with slightly reduced service life
• Some available options:
• Alarm light, Short Roller Arm, NEMA-4X rating
• Class II (combustible dust) hazardous-area ratings

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• Typically mounted close to head and tail pulleys
• Long conveyors may have them spaced periodically along belt
• Can be mounted to monitor carry side or return side of belt
• Ideal mounting:
• 1” gap between roller arm and belt
when belt is centered
• Roller arm is perpendicular to belt
• Belt contacts middle of roller arm

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• Typical ROS installation

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• Another available options is
adjustable mounting brackets:
• Adjustable mounting height
• Universal for left or right side of
conveyor
• Made from 10 gauge 304 SST
sheet

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Conveyor Accessories – Safety Cable Pull Switch
• Safety Cable Pull Switches are used as
emergency shut down devices for conveyors
• (2) SPDT micro switches
• Both actuate simultaneously at 10° of shaft rotation
for alarm and shutdown signals
• Single housing design can be used for both end
of run and middle of run positions
• Some available options:
• Alarm light, NEMA 4X rating,
• Class II hazardous area ratings
• Manual Release lock lever standard

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The most common question asked about the Safety Cable Pull
Switch?
• “What is the maximum spacing between switches?”
Answer:
• The pull cord must remain tight enough to actuate the switch when
pulled
• Pull cable runs that are too long will cause the cable to sag
excessively when temperatures climb in the summer
• Our recommendations for switch spacing are based on expansion
and contraction of the cable with temperature changes, they are:
• Level conveyors – 200’ between switches, half that distance (100’) to a
dead end
• Inclined conveyors – 150’ between switches, half that distance (75’) to a
dead end
• Supports should be placed along the cable about every 8’ (maximum of
10’) or closer

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Why do we de-rate spacing distance for an inclined conveyor?
• On a horizontal conveyor the sag in the pull cable is evenly distributed
• On an inclined conveyor the sag in the pull cable will tend to collect
more at the bottom of the cable run than at the top
• On a very steep incline the weight of the pull cable can actually put
pressure on the actuating arm

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• Some other available options:
• Adjustable mounting brackets
• Designed to piggyback on idler
mounting holes and adjustable
between 5.5” and 12” bolt hole
spacing
• Can be installed with plate
pointing down as shown or with
plate pointing upwards
• Made from ¼” 304 SST plate
• Indicator Flags
• Attaches to bottom of SPS
• Cable Tensioning Kits

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• A Tripper Position Switch (TPS) is basically a very
heavy-duty mechanical limit switch
• (2) SPDT micro-switches
• Both actuate simultaneously at 10° of shaft rotation
• Ø3” x 1.75” Acetal heavy duty contact roller
• It was originally designed by customer request for a
better tripper car positioning switch, but has many
uses
• Tripper Positioning
• Gravity take-up monitoring
• Sampler position monitoring
• Anywhere you need a heavy duty mechanical limit
switch
Conveyor Accessories – Tripper Position Switch

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Position Switches
Switch Actuate Plate
Conveyor Accessories – Tripper Position Switch

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Conveyor Accessories – ROS/SPS/TPS
• All Pro-Line conveyor protection switches feature:
• Heavy duty cast aluminum enclosure with a yellow double-baked urethane
enamel finish and a NEMA 4 rating.
• Splined mounting for secure connection of actuating arms
• Easy wiring access when top cover is removed
• (2) SPDT micro switches for alarm or shutdown, rated for:
• Thermal Rating: 10A @ 500 VAC
• Working Power: 10A @ 250 VAC
• DC Power: 3A @ 24VDC, 0.27A @ 250VDC
• Minimum power rating of 2.4 VA (for example .1 amp at 24V)
• Dual mounting holes
• Through holes on bottom of switch
• Tapped holes on back of switch
• Modular design, same basic housing used for all three
• Many available options and variations

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Conveyor Accessories – Motion Monitor
• Convenient and intelligent monitoring of equipment speeds without
burdening or relying on a PLC
• The heart of the Motion Monitor is the 60-200 controller
• Microprocessor based electronics
• Fully configurable operation
• Optional 4-20 ma output
• Two versions
• Single channel has one user adjustable set point
• Dual channel has two user adjustable set points
• Two different methods of speed pick-up are available
• Direct coupled shaft mount speed sensors
• Proximity probes

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Conveyor Accessories – 60-23P Under Speed Switch
• Simplified under speed indication
• Self contained system has internal proximity sensor,
electronics, adjustments, and terminal connections in
one housing
• Easy set up
• With conveyor equipment running at desired speed turn
calibration dial until light goes out
• When speed drops below that point the light comes on
and the alarm relay trips
• Available in a NEMA 9 version, 60-23PX

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Conveyor Accessories – DTR Flow/No-Flow Switch
• The DTR is used to detect the movement of material
• To detect movement a DTR measures
the frequency of microwaves reflected
off of the material
• It is looking for a “Doppler” shift in the microwave frequency to indicate
movement
• The classic example of a Doppler shift from science class is how the sound
of a train whistle has a higher frequency as it is moving towards you and
then drops lower as it passes you and starts moving away

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• The DTR can determine the difference
between a full and empty conveyor belt when
it is moving. Use this to:
• Control dust suppression equipment
• Control hydraulic actuators on belt cleaners
• Provide alarms for empty belts (or full belts)
• With the sensitivity calibrations you can set the
DTR so a moving but empty belt will not trip the
relay, but material on the belt will
• Note: In this application the remote calibration of a
DTR-231 is often useful

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• It is also used to detect blocked or
plugged process pipes, chutes, valves,
etc...

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• Non contact detection
• Microwaves can penetrate non-conductive materials like plastic, wood, and
fiberglass
• You can place the unit out of the way of process materials or behind
protective shields
• No moving parts
• Nothing to wear out
• Long service life
• No maintenance
• Simple operation and calibration

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Point Level – Tilt Switches
• What does a Tilt Switch do?
• It lets you know if a probe has been moved from a vertical
position
• Why would you want to know that?
• With careful (and sometimes creative) placement you can
use them for controls in many different material handling
situations
• Why use a tilt switch instead of something else?
• Simple
• Rugged
• Easy to understand
VS

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• High level in a bin or silo
• Automatically stop material feed
• High pile detection
• Stacker conveyor discharges
• Automate lateral movement
• Loading spouts
• Automate spout retraction

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• Many others
• Plugged chute detection
• Material flow detection

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Point Level – Tilt Switch Application Tricks
• Momentum moves a tilt probe
• If material builds up slowly around a probe it can remain vertical while it
becomes encased
• Always place the probe as close to moving material as possible while still
keeping it out of the material stream
Correct
Incorrect

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• A Float Ball makes a tilt probe “Tippy(er)”
• The larger surface area of the float lets
the material push on it more
• The relatively heavy probe on top of the
lighter float makes the probe easier to
tip over
• If there is not enough momentum in the
material to tilt the probe use a float ball
• If the material is too light try a float ball
• Always use BOTH S-hooks
• Using both S-hooks gives you 360° of “tilt,” tilting will be limited in some
directions if only one S-hook is used
• Exceptions: when tilting in only one direction is needed installations with one
(or none) S-hooks can be designed
• Remember to close the S-hooks when installed, it keeps the probe from
falling off

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• Don’t hang the probe by a chain
• The longer the chain, the farther the probe needs to swing to tilt
• Exceptions, dustless loading spouts have slow moving material and they use
tilt probes with float balls that hang by chains
• Low level applications require special precautions
• Large columns of material on top of the
probe can put a lot of force on the probe
connections. When the material starts
moving down it can rip off the probe
• Special protective enclosures can be built
to protect the probe in low level applications

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• Tilt probes can be used with or without a controller
• Available models:
• 20-39 – Heavy Duty, Most common probe
• Housing is cast ductile iron with nickel chrome plating
• Normally closed switch operation, rated for 1 amp @ 24VDC
• 20-41 – For use with AC power
• Same rugged housing as the 20-39
• Internal circuitry allows it to accept up 4 amps @ 120 VAC
• Other probe variations available:
• 20-30 SST Housing
• 20-32 Heavyweight Housing
• 20-31 Lightweight Plastic Housing
• 20-39C High Temp, for above 180°F up to 390°F
• 20-39B Low Temp, for below -25°F
• All tilt probes come with at least 25’ of cable, two
S-hooks, and a pipe hanger with conduit threads

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• Controllers are not required but provide extra functionality:
• Local indication with the red and green indicator lights
• Control equipment / processes with internal DPDT relay
• Adjustable time delay, up to 10 seconds
• Available controller models:
• 20-38
• Steel Enclosure
• Two indicator lights with Red and Green
lenses on front panel
• NEMA 4X SST version available
• 20-43
• Lower cost unit, plastic enclosure with clear cover
• Red and Green light bulbs for indication

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• Tilt Switches are available with FM or CSA certifications for hazardous
areas
• Models available:
• 21-38 Controller
• Rated for Class II, Div 1 & 2 areas
• Provides intrinsically safe outputs for tilt probe
• 21-39 Probe
• Rated for Class I and Class II, Div 1 & 2 areas when connected to 21-38
• Other probe models are also available in hazardous area versions
(except for low temp models)
• Both the hazardous area probe and controller must be used together for
the certifications to be valid

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Point Level – Mercury Free Tilt Switches
• Uses the same rugged and abrasion resistant probe
housings as traditional tilt switches
• Probe and controller communicate in order to replicate
the performance of mercury
• The electronics in the probe and controller make the
system highly resistant to jitter or chatter
• Even with a very short time delay, shaking and vibration
will not trip the alarm until the probe is tilted past 15°
• System allows monitoring of probe fault conditions with the
same 2 wire probe cable
• Probe and controller must be used together
• Field mount and DIN mount controls are available
• Probes and controllers are not interchangeable with
traditional tilt switches
The Ramsey Mercury Free Tilt Sensor is now available!

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Point Level – Capacitance Level Switches
What is a capacitance point level?
• Capacitance is a measure of how well an electrical
insulator can keep an electrical charge separated
between two conductors. This insulating ability of a
material is known as the dielectric constant
• A capacitance point level has two conductors and one
insulator
• The first conductor is the sensing part of the probe
• The second conductor is the metal wall of the bin. In non-
metal bins a metal ground plate must be used
• The insulator is whatever is between the two (air or
material)
• The unit detects the presence of material by detecting the
difference in dielectric constant between empty air and
material

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All standard Capacitance probes
have Active Shielding
• A “Shielded” probe has two separate
sections:
• Active sensing section
• Shield section
• The “Active” section creates the electrical
field used to detect material
• The “Shield” section is electrically active,
but is not used for material detection.
The electrical field created by the shield
section forces the sensing field to move
farther away from the probe
• Moving the sensing field away from the
probe lets the probe examine a larger
area and makes it less sensitive to
material build up
Metal bin wall
Active sensing
probe section
Shield probe section
Sensing field
Shield field

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Capacitance probes designed from the start for bulk solids
• Their unique detection circuitry provides
• The highest sensitivity available
• Operating frequency below the RF range
• Complete immunity to temperature changes
• Unsurpassed static electricity protection
• Easy to use
• Convenient screw off cover on the NEMA 4X housing
• Quick and easy calibration with two single turn potentiometers
• The probes are built tough for bulk solids
• 5/8” 316 SST Rod probes
• Standard units are rated for Class II areas, with Class I ratings available
as an option

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• Many options for probe combinations are available…
Top Mount Flexible Probe for long
lengths and/or coarse material
Top Mount Rod Probe for
High level
Flush Mount used as a
High level
Flush Mount used as a
Low level
Short Rod Probe used
as a Low level
Rod Probes used as
High or Mid Level

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Point Level – Rotary Level Switches
• Simple and intuitive
• When material is present it stops the paddle from
turning
• Solid Features:
• Cast aluminum housing, NEMA 4X rating
• Convenient screw off cover
• DPDT alarm relay
• Class I and Class II approvals on standard units
• De-energizing motor with bi-directional slip clutch
• Wide range of available accessories
• Different paddle styles
• Mounting plates
• Top mount extensions and guards

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Point Level – Microwave Point Level
• The Microwave Point Level is a non-
contact way to detect material in
chutes, bins, silos, and other places
• It works like a nuclear point level with a
sender and receiver, but uses low
power microwave energy
• Material in between the sender and
receiver block the microwave signal
• The low power is not harmful and does
not require caution postings
• Maximum spacing between the sender
and receiver can be up to a few
hundred feet

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Point Level – Microwave Point Level
• Microwaves will penetrate non-conductive
material like plastic, fiberglass, and wood
• The most common practice with steel chutes is to
weld tank fittings to the sides and install plastic
plugs for windows
• The sender and receiver are mounted outside the
chute in front of the windows, which keeps them
outside the process
• The microwaves will also penetrate moderate
amounts of non-conductive build up

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Continuous Level – C-Level
• The C-level system weighs the material
inside a vessel to determine level
• Uses strain sensors press fit into the steel
supports of the vessel
• With the sensors installed the supports act
like load cells and weigh the contents
• A C-level is the most accurate method of
measuring material inside a vessel without
using actual load cells
GZ Strain Sensor

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• There are three basic types of C-level applications
• Vessels supported by vertical supports
• Skirted silos supported by steel rings around the full circumference
• Vessels supported by horizontal supports

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• There are three basic things to look for when checking the suitability of
any C-level application
• Is the support structure isolated?
• Is there a suitable location to install the sensors?
• Is there enough stress in the supports to get an accurate reading?
• We will help check any
applications for suitability
and determine the best
location to install sensors
• If possible ask for help during
the design of storage vessels
• Simple changes are often the
difference between a good
application or a poor application

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C-Level systems come with a choice of two standard controllers
• The CL-100 analog Controller
• 50 segment LED bar graph displays % full
• (3) Relay contacts for level alarms
• Optional 4-20ma current output
• Extremely simple two point calibration
• The most commonly used controller
• Or the DCL-100 digital controller
• Displays contents in units such as pounds or tons
• (4) relay contacts for level alarms
• Optional 4-20 ma current output and serial
communications

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• Every C-Level system comes with:
• One Controller
• One Installation tool kit with installation tool
and a precision end cutter for boring sensor
holes
• Up to eight GZ sensors with junction boxes
The junction boxes supplied
mount over top of the sensors
using the holes from the sensor
installation.
The installation tool kit is used to located the sensor, bore the
sensor hole, and press the sensor into place.

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Continuous Level – BOB II
• The BOB measures level with a very simple concept
• A weight on a cable is dropped until it hits material
and cable travel is measured
• Very effective for taking periodical inventory readings
• Highly recommended by the guy who has to climb to
the top of the silo every day to look inside

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• A captive pulley system ensures the
cable will not get tangled or jump off track
• The mechanicals are very resistant to
dust build up, plus there are two dust
barriers:
• Dust seals and wipers on cable entry
• Air purge port to pressurize housing
This unit was still functioning normally

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• All electronics are in a separate
cavity, isolated and sealed from
any dust in the mechanical
section
• RS-485 network wiring between
measurement units
• Different variations of control
equipment is available from
single unit manual operation up
to PLC integration for multiple
units

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