2150EX ATEX flow meter for sewer flow monitoring & surveys

ISCO 2150EX ATEX Area Velocity Meter

  • Available for Rental Next day delivery available to mainland UK when rental paperwork is received by 12 midday (stock permitting)
  • Intrinsically Safe Approved to the ATEX Directive 94/9/EC by Baseefa, and to Class I, Division 1 by CSA for use in hazardous locations
  • Superior Probe Design Provides long term level stability, no temperature drift, no span calibration required and is field interchangeable
Product Options


The 2150EX ATEX-rated Area Velocity Flow Meter is built on digital electronics, so the analog level is digitized in the sensor itself. The probe is factory calibrated for a 3 meter span at different temperatures. This calibration eliminates drift in the level signal and provides long term level stability. This reduces recalibration frequency and completely eliminates span recalibration.
The 2150EX flow meter is powered by two lithium or rechargeable lead acid battery packs, or by the 2194EX network interface module. The battery has a life of up to 8 months at 2 minute data storage intervals due to highly efficient power management.

Standard Features of the 2150EX

  • Rollover memory with variable rate data storage, lets you change the data storage interval when programmed conditions occur.
  • Sealed AV sensor resists fouling by oil and grease, eliminating frequent cleanings needed with electromagnetic probes.
  • Pressure transducer venting system automatically compensates for changes in atmospheric pressure to maintain accuracy
  • Rugged, submersible enclosure is permanently sealed to meet IP68 (NEMA 4X, 6P) requirements
  • High-capacity internal desiccant cartridge keeps the vent free of moisture during normal operation
  • The unit is easy to upgrade. New operating software can be downloaded into non-volatile "flash" memory via PC connection, without affecting stored program and data, and without removing the 2150EX from the hazardous area.
  • Chemically resistant. The epoxy-encapsulated sensor withstands tough applications.
  • Quick connect area velocity sensor can be easily removed and interchanged in the field with no recalibration.
  • Replaceable hydrophobic filter protects against intrusion of water during submersion.
  • Sealed AV sensor resists fouling by oil and grease, eliminating frequent cleanings needed with electromagnetic probes.
  • 38.4k baud communication provides speedy setup and data retrieval.

Manufactured by: Teledyne ISCO
Model: ISCO 2150EX ATEX Area Velocity Meter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Suitable for portable and permanent-site AV flow monitoring for inflow and infiltration, sewer overflow, and other sewer studies.
Measuring shallow flows in small pipes. The low flow profile Area Velocity sensor minimises flow stream obstruction senses velocity in flows down to 25 mm in depth.
Open channel flow measurement in Hazardous Locations (ATEX Category 1).
Suitable for level measurement in explosive or potentially explosive areas, such as digesters, manholes and storage tanks.


Isco 2150EX Intrinsically Safe Flowmeter
Size (H x W x D) 22.6 x 28.0 x 19.3 cm including battery compartment
Weight 3.0 kg (without batteries)
Material High-impact ABS
Enclosure IP68 (NEMA 4X, 6P, self-certified)
Power 7.0 to 9.0VDC, 100 mA typical at 8V DC, 1 mA standby
Batteries Lithium or rechargeable lead-acid batteries, 2 required
Program Memory Non-volatile, programmable flash; can be updated using PC without opening enclosure; retains user program after updating
Flow Rate Conversions Up to 2 independent level-to-area conversions and/or level-to-flow rate conversions
Level-to-Area Conversions
Channel Shapes Round, U-shaped, rectangular, trapezoidal, elliptical, with silt correction
Data Points Up to 50 level-area points
Level-to-Flow Rate Conversions
Weirs V-notch, rectangular, Cipolletti, Isco Flow Metering Inserts, Thel-Mar;
Flumes Parshall, Palmer-Bowlus, Leopold-Lagco, trapezoidal, H, HS, HL
Manning Formula Round, U-shaped, rectangular, trapezoidal
Data Points Up to 50 level-flow rate points
Equation 2-term polynomial
Total Flow Calculations Up to 2 independent, net, positive or negative, based on either flow rate conversion
Data Storage Memory Non-volatile flash; retains stored data during program updates. Capacity 395,000 bytes (up to 79,000 readings, equal to over 270 days of level and velocity readings at 15 minute intervals, plus total flow and input voltage readings at 24 hour intervals)
Data Types Level, velocity, flow rate 1, flow rate 2, total flow 1, total flow 2, input voltage
Level-to-Flow Rate Conversions (continued)
Storage Mode Rollover with variable rate data storage based on level, velocity, flow rate 1, flow rate 2, total flow 1, total flow 2, or input voltage
Storage Interval 15 or 30 seconds; 1, 2, 5, 15, or 30 minutes; or 1, 2, 4, 12, or 24 hours. 5 Bytes per reading.
Setup and Data Retrieval Serial connection to IBM PC or compatible computer with Isco Flowlink 4 Software.
Baud Rate 38,400
Temperature Range -40° to 60°C operating and storage
Area Velocity Sensor
Size (H x W x L) 1.9 x 3.3 x 15.2 cm
Cable Length x Diam 7.6 m x 0.9 cm
Weight (including cable) 1.02 kg
Materials Sensor - Epoxy, chlorinated polyvinyl chloride (CPVC), stainless steel; Cable - Polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC), stainless steel.
Level Measurement
Method Submerged pressure transducer mounted in the flow stream.
Transducer Type Differential linear integrated circuit pressure transducer
Range 0.010 to 3.05 m
Maximum Allowable Level 10.5 m
Accuracy ±0.003 m (maximum non-linearity, hysteresis, and temperature error from actual liquid level, from 0.03 to 3.05 m)
Long-Term Stability ±0.007 m/yr
Compensated Range 0°C to 50°C
Velocity Measurement
Method Doppler ultrasonic, Frequency 500 kHz, Transmission Angle 20° from horizontal
Typical Minimum Depth 25 mm
Range -1.5 to +6.1 m/s
Accuracy (in water, uniform velocity, speed of sound = 1480 m/s) ±0.03 m/s for velocities from -1.5 to +1.5 m/s; ±2% of reading for velocities from 1.5 to 6.1 m/s
Temperature Measurement
Accuracy ±2°C


Related products


Yes, the ordering process is very easy. Orders can be made via purchase order or by credit/debit card. Once we have the paperwork we can delivery next day to any location in Europe. Provided with the equipment is a quick start guide, and if you need extra support, the technical support engineers can be contacted via phone call.
No, all of our flowmeters are competitively priced and rental is an ideal option for cutting costs to a fraction of a full priced new flowmeter.
No problem. The quick start guide is designed to make installing the flow meters a simple task. Everything you require for set up will be found in the peli-box supplied with the flowmeter.
Every flow meter is tested upon shipping and return as part of our ISO9001 procedure. Also, as part of this procedure, the flow meter is calibrated once a year. If a copy of the calibration certificate is needed let us know.
The flow meters typically provide an accuracy of ±1 to 2% of rate, so if you are measuring 100l/sec then the accuracy is between 98-102l/sec.
We are here to help. If the self-help and quick start guides do not help, then call one of our technical support engineers on +44 (0) 1527 882060. We have supplied and supported many clamp on rental installations throughout Europe.
First, contact us for a quote. If you are happy with the quote then send us a purchase order. Or alternatively call us with credit card details and fill out and send us a rental agreement form.
If the stock is permitting, and all paperwork is received by 12pm then flow meters can usually be available the next day.
The minimum hire period for flow meters is one week.
Once you have the meter you can rent it for as long as you need it. However, it would help if you can let us know that you wish to extend the rental period. Upon return the meter is off-hired and once checked and tested, an invoice will be issued to you. Also, if you extend your rental past a 4, 8 or 12 week rental threshold, then you are entitled to a discount.
You are only charged for the period of time for which you have the flowmeter. So, if a flowmeter is returned 3 days late you are only charged for 3 extra days, and each of these days is charged at one fifth of the weeks hire cost.
Normally, you will use your own courier but if you have any problems let us know and we can arrange a pick up the day after you notify us, but you will be charged for the carriage and this cost will be added to the invoice.
Without exception, all our flow meters are tested. If you need a 110v plug instead of the standard 230v plug let us know.
All of our standard transducers will do -40degC to +150degC, but this will depend on your application.
  • Liquid: below 50mm CFLP transducers are required, 50-1000mm CRS-402 transducers and 150-8000mm CRS-401 transducers. All the bits you need can be supplied, and delivered with the meter.
  • Gas: below 80mm CRS-402 is required, for 80-300mm the CRS-401/CRV-310 and for above 300mm the CRW-312 transducers are required.
  • High temperatures: For liquid we can measure +450degC for liquid and for gas/steam +250degC. But please consult RS Hydro.
Of course, we make a small surcharge for each set of transducers. Most applications only require one set, but on occasion some people may require two, for more diverse pipe sizes and applications.
An ultrasonic wall thickness gauge, that measures to within 0.05mm, is provided as standard with all flow meter rental packages.
The screendump facility on the integrated dataloggers on all our flow meters, allows you to photograph any screen and download it to your pc.
After the equipment has been shipped, it is the responsibility of the hirer. However, in our experience it is rare that any of our flow meters are damaged. Our flow meters are tough, as well as accurate, and reliable.
We have hired more ultrasonic clamp on flow meters than any other company in Europe. We are now one of the world's largest distributors of GE Panametrics flow meters. We always review your application before hire so no unwanted surprises are encountered. Every effort has been made to make your flow meter hire and enjoyable experience: quick start guides to help you set up with ease, online videos for further help, rugged packaging for extra durability anywhere, and real flow engineers available for online/telephone support.