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GLFS-1 Series – Liquid Flow Switch

The Liquid Flow Switch is suitable for flow monitoring and control of water and normal media in industrial plants, heating, air conditioning, and refrigeration systems. Enclosed in a water-proof IP65 enclosure, it includes an adjustable stainless steel paddle sizes for pipes up to 203.2mm (8”) in diameter. The switch is suitable for liquid temperatures up to 120°C (248°F) and a maximum working pressure of up to 13.5 Bar (195.8 PSI).

Typical Installation:

The flow switch can be installed in any position,
as far from elbows or obstructions as possible with the arrow pointing in the direction of the flow. If the pipe is vertical, recalibrate the range to balance the paddle weight.

GLFS-1: Data Sheet-PDF

GLFS-1: Installation Sheet-PDF

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Veeder Root-Meter Register

7887 Meter Register:
Designed for maximum readability – engineered for extra life in fuel deliveries and, fluid flow transactions of all kinds.
1. New crisp, high visibility digital display for optimum readability in all ambient lighting.
2. Latest technology, modern materials give maximum dependability at speeds to 250 rpm of right wheel.
3. Positive action knob reset.
4. Built-in precision totalizer accumulates up to 99,999,999 units.
5. Acetal resin components for smooth operation and extra long life.
6. Fits all popular flow meters.

The Meter Register is the outstanding choice for recording and displaying delivery data in a wide variety of industries. In the petroleum refining and distribution field, it is used from the well to pipelines and storage centers, then to gasoline and fuel oil delivery trucks. In the chemical processing field, it can be used for displaying totals during mixing and batching operations.

The 7887 Meter Register totalizes and displays high speed deliveries and transactions in large easy-to-read figures. Ideal for increased efficiency in all kinds of liquid inventory and delivery operations. Utilizing a geared drive available in a wide selection of ratios, the Meter Register records in practically any unit of liquid measure – gallons, liters, barrels, etc. – as well as non-liquid units.

Special optional adaptors are available to mate the Meter Register with all standard meters and pumps. It also easily combines with Veeder-Root Meter Preset and Printer to form a complete count, control and print system.

Finished in corrosion resistant epoxy, the sturdy housing protects the Meter Register in demanding environments and extremes in weather.

Example: Veeder-Root 7887 Meter Register & 7889 Preset fitted to TCS-700 Series Flowmeter.

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Greystone Energy – Air Flow/Temperature Tx.

Air Flow Transducer

ESF is an airflow transducer with a broad application area. It can be used
for control, surveillance, and regulation of the flow rate in fresh-air
and ventilation systems, etc.


  •     Converts airspeed into a 4 – 20mA or a 0 – 10 VDC signal
  •     Linear output signal
  •     Fully electronic registration of airflow
  •     AC or DC voltage supply
  •     Compensates for changes of air temperature
  •     Telescopic sensor facilitates installation
  •     Temperature output signal 0 – 10 VDC
  •     Fuse Protected
  •     Made with corrosion resistant material


The ESF-35-2 airflow transducer can be used in a wide range of applications such as:

  •     Measurements of airflow speed via PLC/outstation/EMS
  •     Regulation of airflow speed
  •     Monitoring of airflow speed

The airflow transducer ESF-35-2 is installed in such a way that the current
of air passes through the gap of the sensor head. Conductors to and
from the transducer should be kept isolated from high-power conductors
where powerful transient voltage spikes may appear.

The ESF-35-2 transducer registers the airflow speed according to a thermal
principle based on the fact that the cooling action of air increases
with airspeed. The action is measured and converted to a 4 – 20mA or a 0
– 10 V signal corresponding to airflow speeds from 0 – 8 m/s (0 – 1575
ft/min) or 0 – 16 m/s (0 – 3150 ft/min).

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Clark Sonic DN-EM KW/Energy Flow Monitor

The DN-EM is an economical energy flow monitor intended for applications in energy transfer and heating/ cooling systems where energy use requires measurement. Energy Monitoring of Heating or Cooling Systems, 1/2” & 3/4” Pipe.

The DN-EM internally calculates the energy passing through the system. The energy used is calculated based on the the mass volume of liquid passing through the system and the difference in temperature between the supply and return lines. The volume of liquid is measured by means of a pulse generating Clark vortex flow transmitter. A RTD sensor built into the flowmeter (T1) measures temperature at the meter and the remote temperature (T2) is measured by means of a precision RTD sensor mounted in a pipe tee.

A scaled pulse output is provided and can be configured to report volume flow rate, mass flow rate or energy total. Modbus 485 communications provides an interface with a building automation or monitoring system.

The unit contains non-volatile memory that records flow and energy, and is updated every ten minutes. However, when flow, mass or energy totals are read, the reported values are true current values; the last stored value is added to the current accumulated value when the applicable register is read.

The default medium for the DN-EM is water. Other media consisting of water and a certain percentage of glycol up to 30% can be field configured.



Clark Sonic Energy Flowmeter Literature 

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