ISCO 2150 Area Velocity Flow Meter

  • Built-In Conversions Range of conversions including flow rate, level-to-area, level-to-flow and total flow calculation
  • Range of Accessories Range of modules includes 2191 Battery Module, 2101 Field Wizard and 2102 Wireless Module
  • Non-Volatile Memory Memory capacity to store up to 79,000 readings
  • Official ISCO Distributors IN STOCK
share this:
Product Options


The ISCO 2150 area velocity flow meter features a smart area velocity probe which is built on digital electronics, so the analog level is digitized in the sensor itself to overcome electromagnetic interference.
The area velocity 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.

In the field, the ISCO 2150 flow meter can be powered by either two alkaline, or ISCO Rechargeable lead acid batteries, within a 2191 Battery Module. The battery has a life of up to 15 months at 15 minute data storage intervals due to highly efficient power management.

Standard Features of the 2150 include:

  • Submersible enclosure meets NEMA 4X, 6P (IP68) environmental specs.
  • Chemically resistant epoxy-encapsulated sensor withstands abuse, resists oil and grease fouling, and eliminates the need for frequent cleaning.
  • The replaceable high-capacity internal desiccant cartridge and hydrophobic filter protect sensor reference from water entry and internal moisture.
  • Secure data storage. All data are continuously stored in flash memory to protect against loss in case of power failure
  • Variable rate data storage lets you change the data storage interval when programmed conditions occur. This feature assures maximum information about an exceptional event such as an overflow while conserving power and data capacity during normal conditions.
  • Easy to upgrade. New operating software can be downloaded into non-volatile flash memory, without affecting stored program and data.
  • Up to four 2100 Series flow modules can be networked by stacking and/or extension cables.
  • Pressure transducer vent system automatically compensates for atmospheric pressure changes to maintain accuracy.
  • The quick-connect sensor can be easily removed and interchanged in the field without requiring recalibration.
  • Secure data storage. All data are continuously stored in flash memory to protect against loss in case of power failure
  • Records and stores input voltage and temperature data.
  • 38,400 bps communications provides speedy setup and data retrieval.

Manufactured by: Teledyne ISCO
Model: ISCO 2150 Area Velocity Flow Meter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Partially filled-pipes
Open channels - uniform and non uniform
Irrigation channels
Short term flow studies
Permanent - real time telemetry


2150 Flow Module
Size (HxWxD) 2.9 x 11.3 x 7.5 in (74 x 287 x 191 mm)
Weight 2.0 lb (0.9 kg)
Materials of Construction High-impact polystyrene, stainless steel
Enclosure (self-certified) NEMA 4X, 6P (IP68)
Temperature Range -40° to 140°F (-40° to 60°C) operating and storage
Power Required 12 VDC nominal (7.0 to 16.6 VDC), 100 mA typical, 1 mA standby
Power Source Typically, an Isco 2191 Battery Module, containing 2 alkaline or 2 rechargeable lead-acid batteries. (Other power options are available; ask for details.)
Typical Battery Life (using 15-minute data storage interval) Energizer® Model 529 alkaline - 15 months; Isco rechargeable lead-acid - 2.5 months
Program Memory Non-volatile programmable flash; can be updated using PC without opening enclosure; retains user program after updating.
Built-in Conversions
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 Conversions Most common weirs and flumes; Manning Formula; Data Points (up to 50 level-flow points); 2-term polynomial equation
Total Flow Calculations Up to 2 independent, net, positive or negative, based on either flow rate conversion
Data Handling and Communications
Data Storage 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, temperature
Storage Mode Rollover; 5 bytes per reading.
Storage Interval 15 or 30 seconds; 1, 2, 5, 15, or 30 minutes; or 1, 2, 4, 12, or 24 hours; Storage rate variable based on level, velocity, flow rate, total flow, or input voltage
Data Retrieval Serial connection to PC or optional 2101 Field Wizard module; optional modules for spread spectrum radio; land-line or cellular modem; 1xRTT. Modbus and 4-20 mA analog available.
Software Isco Flowlink for setup, data retrieval, editing, analysis, and reporting
Multi-module networking Up to four 2100 Series Flow Modules, stacked and/or remotely connected. Max distance between modules 3300 ft (1000 m).
Serial Communication Speed 38,400 bps
2150 Area Velocity Sensor
Size (HxWxD) 0.75 x 1.3 x 6.0 in (19 x 33 x 152 mm)
Cable (Length x Diameter) 25 ft x 0.37 in (7.6 m x 9 mm) standard. Custom lengths available on request.
Weight (including cable) 2.2 lbs (1 kg)
Materials of Construction Sensor - Epoxy, chlorinated polyvinyl chloride (CPVC), stainless steel; Cable - Polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC)
Operating Temperature 32° to 140°F (0° to 60°C)
Level Measurement
Method Submerged pressure transducer mounted in the flow stream
Transducer Type Differential linear integrated circuit pressure transducer
Range (standard) 0.033 to 10 ft (0.010 to 3.05 m); (optional) up to 30 ft (9.15 m).
Maximum Allowable Level 34 ft (10.5 m)
Accuracy ±0.01 ft from 0.033 to 10 ft, (±0.003 m from 0.01 to 3.05 m)
Long-Term Stability ±0.023 ft/yr (±0.007 m/yr)
Compensated Range 32° to 122°F (0° to 50°C)
Velocity Measurement
Method Doppler ultrasonic, frequency 500 kHz
Typical Minimum Depth 0.08 ft (25 mm)
Range -5 to +20 ft/s (-1.5 to +6.1 m/s)
Accuracy (in water with uniform velocity profile, speed of sound = 4850 ft/s, for indicated velocity range); ±0.1 ft/s from -5 to 5 ft/s (±0.03 m/s from -1.5 to +1.5 m/s); ±2% of reading from 5 to 20 ft/s (1.5 to 6.1 m/s)
Temperature Measurement
Accuracy ±3.6°F (±2°C)
2191 Battery Module
Size (HxWxD) 6.0 x 9.6 x 7.6 in (152 x 244 x 193 mm)
Weight (without batteries) 3.2 lb (1.4 kg)
Materials of Construction High-impact polystyrene, stainless steel
Enclosure (self certified) NEMA 4X, 6P, (IP68)
Batteries Two 6-volt Energizer Model 529* alkaline (25 Ahrs capacity) or Isco Rechargeable Lead-acid (5 Ahrs capacity) recommended. *Note Energizer 529 ER does not give specified life.