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4210 Ultrasonic Level Measurement Flow Meter

Part Number: 684210001Product Details


Ultrasonic level measurement - non-contacting sensor means no scheduled maintenance.
The 4210 Ultrasonic Flow Meter provides non-contact sensing of the flow over a weir or in a flume. The ultrasonic sensor is mounted above the flow stream, and transmits a sound pulse that is reflected by the surface of the flow. The elapsed time between sending a pulse and receiving an echo determines the level in the channel. Automatic compensation for air temperature ensures measurement accuracy.

Because its sensor does not contact the liquid, the 4210 provides long-term dependability with no scheduled maintenance. The Isco 4210 is not affected by chemicals or high concentrations of grease, suspended solids or silt in the flow.

You can retrieve stored data on-site with a laptop PC or an Isco 581 Rapid Transfer Device, or remotely via telephone using an optional modem. Isco Flowlink Software produces a variety of informative graphs and reports from stored data.

Includes ultrasonic level sensor with 25 foot cable, sensor mounting bracket, 2 rolls of printer paper and 2 printer ribbons. Also includes instruction manual, pocket guide and coupon for free Isco Open Channel Flow Measurement Handbook. Order other sensor mounting hardware as required.

• Built-in flow conversions for most applications, including Manning formula, data points, or equation for special situations
• Two-line × 80-character backlit LCD
• Built-in dot matrix printer gives you an accurate, on-site printout
• Internal memory stores over 2 months of flow, rainfall, parameter, and sample data at 15 minute intervals
• Automatic gain adjustment in response to echo strength - maximises performance in the presence of steam, foam, and turbulence
• Variable Blanking Distance eliminates false echo problems caused by obstructions such as manhole rungs
• Interfacing for Sampler activation, connection to multiparameter water quality sonde, alarm outputs


• Portable and fixed-site flow measurement with weirs and flumes
• Pretreatment Compliance
• Stormwater Runoff Monitoring
• Permit Enforcement
• Sewer Flow Monitoring
• Combined Sewer Overflow Studies
• Wastewater Treatment Plant Operations
• Inflow and Infiltration Studies
• River and Stream Gauging


Part Number: 684210001
934 NiCad Battery 7 to 8 days
946 Lead-Acid Battery 10 to 12 days
948 Lead-Acid Battery 2 to 2½ months
Analog Outputs (optional) Up to 3 isolated internal outputs, 0 to 20 mA or 4 to 20 mA, scaleable based on level, flow rate, pH, DO, conductivity, or temperature, into a maximum of 750 ohms each
Blanking Distance 0.6 to 3.7m (2 to 12 ft)
Cable, Length × Diameter 7.6m × 0.8cm (25 ft × 0.3")
Capacity 80000 bytes (approximately 40000 readings) divided into a maximum of 12 memory partitions. Equal to 100 days of level, rainfall, pH, DO, conductivity, and temperature readings at 15 minute intervals, plus 3000 sample events. Optional expansion to 473000 bytes (approximately 236500 readings)
Character Size (H×W) 2.4mm × 1.7mm (0.09" × 0.07")
Communication Direct connection, optional internal 2400 baud telephone modem with voice messaging
Compensated Temperature -30°C to 60°C (-22°F to 140°F)
Data Retrieval (optional) Isco 581 Rapid Transfer Device (RTD)
Display Backlit LCD, 2-line, 80-character (5.5mm high × 3.2mm wide)
Enclosure NEMA 4X (IP65)
Enclosure NEMA 4X, 6; IP67
Flumes Parshall, Palmer-Bowlus, Leopold-Lagco,Trapezoidal, H, HS, HL
For Head Change <0.31m (<1.0 ft) Maximum error is ±0.006m (±0.02 ft)
For Head Change of 0.31m to 3.05m (1.0 ft to 10 ft) Maximum error is ±0.009m (±0.03 ft)
Frequency 40 kHz
Interval Report Contents Site number; time interval; total flow; minimum, maximum, and average flow rate, level, pH, DO, conductivity, and temperature, and time of occurrence; interval flow; total rainfall; number of samples, flow meter history and sampler history
LCD 9-digit, floating decimal point, resettable
Length × Diameter 17.5cm × 9.1cm (6.9" × 3.6")
Manning Formula Round, U-channel, rectangular, trapezoidal Data Points Four sets of 50 level-flow rate points Equation Two-term polynomial
Material High-impact molded polystyrene structural foam
Materials Sensor housing is Xenoy 6120; Cable jacket is Polyvinyl chloride (PVC)
Mechanical (optional) 7-digit, non-resettable
Operating Temperature -18°C to 60°C (0°F to 140°F)
Operating Temperature -30°C to 60°C (-22°F to 140°F)
Paper 11.4cm wide × 19.8m (4.5" × 65 ft.), plain white paper, replaceable roll
Parameter Inputs pH, dissolved oxygen, conductivity, and temperature (with optional YSI 600 sonde); pH and temperature (with optional Isco 201 Parameter Module); or dissolved oxygen and temperature (with optional Isco 270 Parameter Module)
Power 12 to 14V DC, 24 mA average at 12.5V DC
Program Memory Non-volatile, programmable flash. Updateable without opening enclosure.
Rain Gauge Input Contact closure, normally open. Resolution 0.25mm or 0.1mm (0.01" or 0.004")
Range (distance from sensor to liquid) Minimum 0.6m (2 ft)
Maximum 3.7m (12 ft)
Recording Modes Up to 3 graphs of level, flow rate, pH, DO, conductivity, and temperature vs time; includes totalised flow. Rainfall and sampler events (time and bottle number) are also recorded
Recording Span User selectable with multiple over-ranges
Relay Outputs 2 form C relays with field selectable trip points based on flow rate (with optional High/Low Alarm Relays)
Reports Printed Flow meter program, 2 independent time interval reports, flow meter history, sampler history
Resolution 1/240 of recording span
Ribbon 6.0m (19.7 ft) black nylon, replaceable
Sampler Activation Conditions Enabled, disabled, AND and OR combinations of any two of level, flow rate, rainfall, pH, DO, conductivity, and temperature
Sampler Input Event mark, bottle number
Sampler Pacing Output 12V pulse
Serial Output Current status and readings, in response to command or automatically at selectable time intervals, ASCII comma separated values at 1200, 2400, 4800, or 9600 baud
Setup and Data Retrieval IBM PC or compatible computer with Isco Flowlink 4 for Windows
Size (H × W × D, without power source) 43cm × 29cm × 26.7cm (17.0" × 11.5" × 10.5")
Span 0 to 3m (0 to 10 ft)
Speed Off, 1.25, 2.5, 5, 10 cm/hr (0.5, 1, 2, 4 in/hr)
Storage Temperature -40°C to 60°C (-40°F to 140°F)
Temperature Coefficient Maximum error over compensated temperature range (per degree of temperature change) ±0.000085 × D per °C (±0.000047 × D per °F) where D is the distance from the transducer to the liquid surface
Voice Messaging (with optional internal modem) Calls up to 5 telephone numbers with programmable delay between calls, activated based on AND and OR combinations telephone of any two of level, flow rate, rainfall, pH, DO, conductivity, and temperature
Weight (incl. cable) 1.2kg (2.6 lbs)
Weight (without power source) 7.8kg (17.3 lbs)
Weirs V-notch, rectangular with and without end contractions, Cipolletti