Search This Site

(Search by Product Type i.e. Level or Brand Name i.e. Walchem)

Sonic-Pro S4 Ultrasonic Flowmeters
by Blue White Industries

USA Toll Free: 1-800-730-0302 Tel: 416-240-1920 -


Sonic-Pro S4 Ultrasonic Flowmeters


ULTRA-PURE Applications, DI Water, and low particulate ground water.

  • Process Control Relay

  • 4-20mA and Pulse Output

  • Transit Time operating mode for measurement of water containing low levels of chemicals and up to 5% particulate

  • Inline spool piece (inline fitting)

  • No moving parts, not liners to wear out

  • Advanced communication: Industrial Ethernet, Modbus RTU, Modbus TCP, PROFIBUS TPV1, and PROFINET

  • Special low power mode permits operation with battery for limited functions

  • NSF 61 listed for drinking water standards

  • 2 year factory warranty


Pipe Sizes 1/2", 3/4", 1", 1-1/2" and 2"

Fluid Water to 5% (0 to 50,000 ppm) particulate

Accuracy +/- 2% of rate > 1 ft/sec. +/- 0.10 ft/sec < 1ft/sec

Interface & Data

Data Outputs:
Isolated 4-20 mA output – fully configurable, invertible 0-1000 Hz Pulse output – fully configurable, invertible

Data logging:
date/time stamped flow rate and flow total data in FAT32 file format, easily imported into Excel. Configurable to trigger on time interval (1-999,999 sec), rate and/or total set-point values. Store up to 191,800 log events in the memory buffer, downloadable to flash memory via USB port.

External Communications:
Computer connection via optional Communications Modules: Industrial Ethernet/IP Modbus RTU Modbus TCP Profinet RT/IO Profibus DPV1

Process Control:
Two independently configurable Form C relays. Load capacity: 30V, 100mA max (ext. supplied)

Configure to flow rate
for high/low/range rate alarm. Programmable release values enable auto release or manual batching operation.

Configure to flow total
for automatically triggered, timed batch operations for proportional feed applications.

Environment NEMA 4X (IP66)


Meter size:
Dimensions: 7.24H x 6.69W x 3.11D inches (184H x 170W x 79D mm)
3.7 lb. (1.7 Kg.)

Tech. Data Sheet (PDF) 85000-117

Instruction Manual (PDF) 80000-493


About Us

Metex Corporation Limited has been providing superior products and services to the process control, chemical treatment, waste water, industrial and manufacturing industries for over 25 years. It is our goal to continually provide our customers with the best possible equipment, technology, and service.


Our Products

Dataloggers, sensors, pumps, recorders, hand held instruments, flow instrumentation, level controls, valves, instrumentation, containers, tanks, transmitters, data loggers, digital indicators, mixers and agitators, pressure intrumentation, analyzers and controllers for a variety of industrial applications such as water quality, pH/ORP and more.

Website Content

Water Analyzers and Controllers, Wireless Products, Corrosion Monitoring Equipment, Cooling Tower and Boiler Controllers, a wide variety of Pumps, Valves, Dataloggers and Recorders, HVAC, Instrumentation, Skids and Systems, Containers and Tanks from world leading manufacturers are products you will find on this site.

Get in Touch