Omni Instruments
contact icon+44 (0) 845 9000 601
+44 (0) 1382 443000

Contact our technical sales team now to discuss your requirements

help icon
MY BASKET basket arrow


My Cart

You have no items in your shopping cart.

Click basket to edit.


Latest added news blog
FRIGGA A90 Cold Chain Temp & GPS Logger
Kenny Laidlaw
May 21,2019
The FRIGGA A90 is a disposable USB cold chain data logger suitable for monitoring temperature and more >
Ex-FlowSIREN ATEX Approved Flow Monitor For Open Channels and Sewers

Ex-FlowSIREN ATEX Approved Flow Monitor For Open Channels and Sewers

Quick Overview

The Ex-FlowSIREN™ is a 3G Wireless, Area Velocity, Flow Monitor used for Open Channel Flow in Zone 0 hazardous explosive environments. The monitoring platform is equipped with Dual Wave Doppler Velocity technology and a precision 30ft (10m) 15 PSI pressure depth transducer.
View Options


The Ex-FlowSIREN is an ATEX approved ultrasonic area velocity open channel flow meter suitable for use in sewers and open channels. The system uses a combination of ultrasonic velocity measurement and water depth measurement to accurately calculate volumetric flow of waste water in circular and semi circular pipes.

In addition to the flow and depth sensor each system can be equiped with with float sensors for high/low level measurement and a video camera to record images. All logged data is sent via the cellular network to a server where it is published online to a secure web interface where users can login to see real time and historic data. Units are battery powered and completely stand alone. Typical battery replacement intervals are 6 months with data being sent every 30 minutes to the web interface.


Ex-FlowSIREN installed in a sewer with optional float level sensor

EX-Flow in Sewer



Certification:    ATEX
     Ex II 1 G ia IIB T4 Ga
Wireless    3G (HSDPA) or 2G (GPRS)
Power    Long Life Rechargeable or Alkaline
Construction    IP68 Submersible Moulded Impact Proof Plastic
RTU:    Ultra-Low Power MSP
Flow Sensors:    Dual Area Velocity
Alarm Sensors:    Dual CSO Floats
Flow Velocity:    DualWAVE Ultrasonic Doppler
Flow Depth:    30ft - 10m 15PSI Pressure Depth
Connectors:    IP68 Threaded Marine or 1/4 Turn Bayonet
Color:    Standard Blue         

Availability: Stock Item


Components / Downloads

For further information, technical advice, or a quotation please call or email us. If you are not sure which product you need one of our technical sales advisors will be happy to discuss your application. We also accept company purchase orders by fax or post. Credit card orders can also be placed over the phone for any product.

Ex-FlowSIREN™, Wireless ATEX Flowmeter. Battery Powered. 2G/3G Wireless Flowmeter. Designed for Zone 0 Explosive Areas. Certification:, Ex II 1 G, Ex ia IIB T4 Ga, CE 0518, Dual AV Ports. Dual Overflow Option. IP68 Surcharge Protected
View FileBrochure
   Size: (963.48 KB)
or call us for a quote
Alkaline Battery Pack. 12V 28Ah Long Life Battery. 6 Month Typical Battery Life. [6 hour Wireless upload. 15 min sample rate Single Av Sensor]
or call us for a quote
Depth Velocity Sensor (AV). Digital Dual Wave Doppler Velocity with 10m (30ft) Pressure Depth Sensor
or call us for a quote
Alarm Switch. Overflow Level Switch with Digital Data Output. High and Low Levels are measured using: Solid State 25ft ON/OFF Float Switch
or call us for a quote