Isodaq Technology is now part of Hydro International.

FloPro3 Doppler Flow Meter


  • Multi-channel flow meter for combined flow and water quality monitoring
  • Technology - continuous wave doppler flow-meter with plug-in WQ sensors
  • Range of input and output card options for 3rd party sensors
  • Width range - 150mm to 2.5metres
  • Depth range - 4 metres maximum
  • Accuracy - typically 5% - 15% of flow reading depending on site calibration.

FloPro at weir

Full Description

MACE, based in Australia, is a world-leader in designing doppler flow meters with over 40 years experience.

The all new MACE Series 3 FloPro features MACE field proven Doppler velocity and level measurement sensors. Advanced spectrum signal processing allows the FloPro velocity sensors to produce superior results under a wide range of hydraulic operating conditions. Even when the pipe slope is unknown or under full pipe, in surcharge, or reverse flow conditions, the FloPro3 produces accurate, repeatable results every time. With the new Series 3 FloPro, up to five Doppler flow sensors can be monitored by the same instrument, making flow measurements even more flexible and affordable.

The Series 3 FloPro also comes equipped with a powerful array of standard sensor inputs and outputs, making monitoring of other water quality parameters a simple process. Whether you need to measure flow as well as conductivity, pH and rainfall or simply utilize a downward looking ultrasonic depth sensor, the FloPro3 is fully expandable to your needs.

The instrument is easy to install, easy to use and virtually maintenance free. Unlike conventional flow meters, FloPro3 has no moving parts and provides minimal obstruction to the flow. This means that the meter stays in service longer without time-consuming repairs.

FloPro3 is a low-cost, upgradeable flow meter which, like all flow measurement methods, will give excellent long-term performance if installed in the right channel and flow conditions. Continuous wave doppler devices need good approach conditions with uniform, non-turbulent velocity in the upstream channel. Isodaq Technology therefore recommend that the MACE range of flow-meters are only installed in appropriate channel conditions and should always be calibrated in-situ by an experienced hydrometrist. Our sister Division, Hydro-Logic Services, will be pleased to provide a quotation to conduct feasibility/design, installation and in-situ calibration services.

The all new MACE Series3 FloPro is the total monitoring solution for both water quantity and water quality!


  • Same insertion sensor will measure in full pipes 100 mm (4") to 2.5 meters (100") diameter
  • Same strap mount sensor will measure in partially full pipes 150mm (6") to 2.5 meters (100") diameter
  • Optional combined depth/velocity sensor can be used in open channel or non-full pipe application
  • Single unit with up to five MACE velocity sensors
  • Weatherproof, polycarbonate case that can be padlocked for added security
  • Real time display of flow rate and total flow in user selectable units
  • Vandal resistant design
  • No moving parts and virtually maintenance free
  • Chioce of either solar panel or mains powered charger
  • Use multiple 3rd party sensors via up to 3 optional I/O card slots
  • Optional link to Hawk XT telemetry logger with choice of PSTN, GSM/GPRS or Satellite modem

Mace Doppler Ultrasonic Flow Sensors

These MACE Doppler ultrasonic flow sensors are compatible with the Mace AgriFlo and FloPro and ultrasonic flow meters.

Mace Strap Mount (Velocity Only) Sensor

Strap Mount (Velocity Only) Sensor

This sensor is used to measure velocity in full pipes when access to the pipe is available and the pipe can be emptied when installation or maintenance is required. It can also be used in situations where the user is measuring depth by a third party or ultrasonic sensor. The sensor is first mounted on a polypropylene mounting strap and then installed within the pipe.

Material type: P.V.C.
Pipe sizes: 150mm (6") to 2000mm (79")
Dimensions: 125mm (5") L x 50mm (2") W x 16mm (0.62") H

Mace Strap Mount Velocity/Depth Sensor

Strap Mount Velocity/Depth Sensor

This type of sensor is used in open channels or pipes that run partially full. This sensor is used to measure depth (using a capacitive pressure diaphragm) and velocity. Access to the monitoring point is required for installation and maintenance. The sensor is first mounted on a polypropylene mounting plate and then installed within the pipe or channel.

Depth Sensor

This type of sensor is a depth only strap mount sensor that is typically used to measure the depth of a surcharge event in a sewer system manhole or depth over a weir or flume.

Material type: P.V.C.
Pipe sizes: 150mm (6") to 2000mm (79")
Dimensions: 125mm (5") L x 50mm (2") W x 16mm (0.62") H
Depth range: 4m (158"), 10m (394")

Mace Insert Sensor (Velocity Only)

Insert Sensor (Velocity Only)

Insertion sensors require access to the outside wall of the pipe in which the sensor is to be mounted. These sensors can be installed through a 2 inch ball valve or just through a 2 inch female thread fitting.

Material type: Nickel plated Brass (standard), 316 Stainless Steel (optional)
Thread type: Either 2" BSP or 2" NPT
Pipe sizes: 100mm (4") to 2000mm (79")
Dimensions: 355mm (14") L x 45mm (1.8") dia. x 25mm (1") H