Pulsar instruments
Designed and manufactured by Pulsar Measurement
- Sensors, transmitters, and controllers
- Specifications, approvals, and certificates
- Firmware, manuals, and product warranty
Pulsar Measurement
Accurate Flow and Level Measurement with Pulsar Measurement
Clamp-on and open channel flow meters, level sensors, and controllers for water, wastewater, and industrial plants, connected to your PLC and SCADA by the WSI team.
About the manufacturer
Instruments from Pulsar Measurement, selected and integrated for your site
Pulsar Measurement designs and manufactures flow and level measurement instruments. The company started in 1986 as Greyline Instruments, and in 2020 Greyline Instruments and Pulsar Process Measurement were combined under the name Pulsar Measurement. It is part of the TASI Measurement group, with teams and facilities in the UK, the USA, Canada, and Malaysia.
The range covers clamp-on ultrasonic flow meters for full pipes, open channel flow meters for flumes, weirs, and channels, ultrasonic and radar level sensors, pump controllers, and sludge blanket measurement. Most controllers provide 4-20 mA and relay outputs, with Modbus, Profibus, or HART options depending on the model, so readings can be passed to a PLC, RTU, or SCADA.
Learn about Pulsar Measurement on the official website (opens in a new tab)
WSI services
Selection, integration, and support
- Site survey and instrument selection
- Installation, wiring, and connection to PLC or SCADA
- Commissioning, training, and technical support
Measurement technologies
One manufacturer for flow, level, and pump control
The main technologies in the Pulsar Measurement range and where each one fits.
Clamp-on Doppler
Measures flow in full pipes from outside the pipe, for liquids that carry solids or bubbles such as wastewater, sludge, and slurry.
Clamp-on transit time
Measures flow in full pipes of relatively clean liquid from outside the pipe, without cutting the pipe or stopping the process.
Flume or weir
Calculates open channel flow from a non-contacting level measurement at a flume or weir, using the matching flow equation.
Area-velocity
Combines level and velocity to calculate flow in channels and pipes without a flume or weir. Non-contacting and submersible options are available.
Ultrasonic level
Non-contacting level measurement for tanks, wet wells, reservoirs, and channels.
Radar level
Radar level sensors such as REFLECT, used by WSI for water level in irrigation channels, rivers, and tanks.
Pump control
Controllers that run pumps in a wet well or pump station based on level, with alarm and control relays.
Sludge blanket
Measures the sludge blanket level in clarifiers and settling tanks to support desludging.
Model selection depends on the liquid, the pipe or channel geometry, the required accuracy, and site conditions. Specifications and approvals always follow the latest Pulsar Measurement datasheet for each model.
Products
Pulsar instruments in our product range
Pulsar models in the WSI product range, including the REFLECT radar sensor that WSI uses widely in irrigation. Other models can be proposed to suit the application.
PULSAR REFLECT
2-wire radar level sensor
Non-contacting radar level sensor for water and wastewater, rivers, and channels. WSI uses REFLECT widely to monitor water level in irrigation networks.
- 63 GHz FMCW radar, 2 mm accuracy
- Range options of 8, 20, or 36 m, 6° beam angle
- IP68 enclosure, HART compatible
- Setup over Bluetooth with a web app
DFM 6.1 Doppler Flow Meter
Clamp-on flow meter for full pipes
For liquids with suspended solids or bubbles. The sensor is clamped to the outside of the pipe, so there is no obstruction to flow and no pressure drop.
- Pipes from 12.5 mm inside diameter
- Isolated 4-20 mA output and 2 programmable relays
- Modbus RTU or HART output option
- Built-in data logger and reverse flow measurement
FlowCERT
Open channel flow monitor
Open channel flow measurement with data logging and control functions, with pre-programmed flumes and weirs for quick setup.
- 5 alarm/control relays and 4-20 mA output
- Accepts a velocity sensor for channels without a flume or weir
- Modbus or Profibus option, IP65 enclosure
- MCERTS Class 1 when combined with the DUET system
FlowCERT Lite
Open channel flow controller
A FlowCERT controller with a dB3 ultrasonic transducer and a PT100 temperature sensor, for flow measurement at flumes and weirs.
- MCERTS Class 1 certified
- Meets the BS 3680 open channel flow standard
- 5 relays and 4-20 mA output
- Optional data logging, Modbus, or Profibus
Summary from the Pulsar Measurement product pages. Full specifications are in the datasheet of each model.
Applications
Where Pulsar instruments are used
Typical examples. The scope of each project is set during survey and design.
01
Irrigation networks
Water level at weirs, intakes, and channels, and flow at gates or measuring structures, sent to the irrigation SCADA.
02
Water treatment plants
Raw water flow at the intake, flow between process stages, and reservoir level.
03
Wastewater treatment plants
Inlet and outlet flow at flumes or weirs, effluent discharge monitoring, and sludge blanket level.
04
Pump stations and industry
Wet well and reservoir level, pump control, process water, and liquids with solids such as slurry.
System architecture
From the measurement point to the SCADA screen
The instrument measures and calculates flow or level. Its outputs go to a PLC, RTU, or data logger, then to SCADA for monitoring and history.
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01
Sensors
Ultrasonic, radar, or velocity sensors on the pipe, channel, or tank
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02
Pulsar controller or meter
Flow and level calculation, totaliser, local display, and logging
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03
PLC / RTU / data logger
Receives 4-20 mA, relays, Modbus, Profibus, or HART
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04
SCADA
Process screens, trends, alarms, and reports, for example TOPKAPI
The output type, cable distance, and communication protocol are agreed during design so they match the PLC, RTU, or SCADA already on site.
WSI support
From site conditions to readings you can trust
The WSI team supports Pulsar instrument projects at every stage.
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01
Application review
Check the liquid, the pipe or channel dimensions, any existing flume or weir, and the readings operators need.
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02
Model selection
Choose the measurement technology, model, sensor, and output that fit the site.
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03
Installation and integration
Mount the sensor, run cables, set up the controller, and connect it to the PLC, RTU, or SCADA.
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04
Commissioning and training
Check readings in the field, train operators, and provide technical support after handover.
FAQ
Frequently asked questions
01Doppler or transit time, which one should I use?
Doppler works for liquids that contain solids or bubbles, such as wastewater and sludge. Transit time suits relatively clean liquids. Pipe material, diameter, and the available straight run also affect the choice, so WSI checks the site first.
02Does open channel measurement always need a flume or weir?
No. With a flume or weir, flow is calculated from level. Without one, an area-velocity system measures level and velocity together, for example FlowCERT with a MicroFlow sensor.
03Can the readings be sent to our SCADA?
Yes. Most Pulsar controllers provide 4-20 mA and relay outputs, and several models offer Modbus, Profibus, or HART. The output is chosen to match the PLC, RTU, or SCADA on site.
04What does MCERTS Class 1 mean?
MCERTS is the monitoring certification scheme of the Environment Agency in England. FlowCERT Lite holds MCERTS Class 1 certification for open channel flow, and FlowCERT reaches Class 1 when combined with the DUET system. Requirements in Indonesia still follow local regulations.
05How do I start a consultation with WSI?
Contact us on WhatsApp or through the Get a Quote page. Share the type of liquid, the pipe or channel dimensions, and photos of the measurement point so the first discussion is focused.
Discuss Your Flow and Level Measurement
Tell the WSI team about the measurement point, the liquid, and how the data will be used.