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Products > Open Channel Flow Measurement > 3000 Series Flow Transmitters >

 3010 Ultrasonic Flow Transmitter

Fixed-site flow/level transmitter with non-contacting Ultrasonic sensor.

The 3010 is AC powered for permanent installation. It has no internal data storage, but provides 4-20 mA analog and RS-232 serial outputs, as well as relay switches and pulsed DC totalizer outputs for flexible interfacing and control.

The ultrasonic level sensor is mounted above the flow stream and transmits a sound pulse that is reflected from the liquid surface. The elapsed time between sending a pulse and receiving an echo determines the level in the channel. Because the sensor does not contact the liquid, the 3010 provides long-term dependability with no scheduled maintenance. It is ideal for measuring flows containing harsh chemicals, grease, suspended solids or silt.

A keypad and backlit LCD make programming fast and easy. Level-to-flow rate conversions for most weirs and flumes are built in, or you can enter an equation or use an optional Characterization PROM chip. When programming is complete, the 3010 displays data in selectable units of measure. A non-resettable totalizer gives you a permanent record of flow.

Standard Features

  • Lockable enclosure is rated NEMA 4X and IP56 for watertight, dust-tight, corrosion resistant operation.
  • Built-in heaters ensure dependable outdoor operation in cold climates.
  • A sampler relay will signal your sampler to collect flow proportioned samples.
  • Built-in level to flow conversions are included for most weirs, flumes, and other devices
  • Non-resettable mechanical totalizer provides tamper-proof record of cumulative flow


  • Flow-proportional control of processes such as chlorination or pH neutralization using the 4 to 20 mA output
  • Optional alarm relays activate external equipment such as pumps, alarms and indicators.
  • Transmitting flow data to computer or SCADA system using RS-232 output

Options and Accessories

  • Optional alarm relays activate external equipment such as pumps, alarms and indicators.
  • Characterization PROM can be factory configured to your primary device
  • Remote totalizer. Eight digit non-resettable totalizer in conduit mount enclosure. Connects to flow transmitter with 1,000 ft. maximum cable length

Isco 3010 Ultrasonic Flow Transmitter
Size (HxWxD): 15.3 x 10.6 x 7.38 in (38.7 x 27.0 x 18.7 cm)
Weight: 10 lbs (4.5 kg)
Material: High-impact molded polystyrene structural foam
Enclosure: Nema 4X (IP56)
Power: 104 to 127V AC, 0.075 A; or 208 to 254V AC, 0.038 A, 50/60 Hz
Operating Temperature: -20° to 140°F (-30° to 60°C)
Storage Temperature: -50° to 150°F (-46° to 66°C)
Display: 6-digit backlit LCD, digits 0.5 inch (1.27 cm) high
Totalizer: 7 digit mechanical, non-resettable
Level-to-Flow Rate Conversions
WEIRS: V-notch, rectangular with and without end contractions, Cipolletti.
FLUMES: Parshall, Palmer-Bowlus, Leopold-Lagco, trapezoidal, H.
MANNING FORMULA: Round, U-channel, rectangular, trapezoidal.
EQUATIONS: Two-term polynomial of the form K^1H^N1 ±K^2H^N2.
Characterization PROM: (optional) Factory programmed with any level-to-flow rate relationship
Communications and I/O
Sampler pacing output: Isolated contact closure, rated 1 A at 48V DC
Sampler input: Event mark, bottle number
Analog output: Isolated 4 to 20 mA based on level or flow rate, with or without sampler event marks, into a maximum of 1000 ohms
Relay outputs: 2 form C relays with field selectable trip points based on flow rate, rated 3 A at 24V AC or DC (with optional High/Low Alarm Relays)
Serial data output: RS-232 ASCII string of level, flow rate, total flow, sample number and bottle number, once every 12 seconds
Format: 300 baud, 7 data bits, 2 stop bits, even parity
Remote totalizer output: 12V pulse, compatible with Isco Remote Totalizer
Ultrasonic Sensor
Length x diameter: 6.9 x 3.6 in (17.5 x 9.1 cm)
Cable: 25 ft x 0.3 in (7.6 m x 0.8 cm)
Weight (incl cable): 2.6 lbs (1.2 kg)
Enclosure: NEMA 4X, 6; IP67
Operating temperature: -22° to 140°F (-30° to 60°C)
Compensated temperature: -22° to 140°F (-30° to 60°C)
Materials: Sensor housing is Xenoy 6120; Cable jacket is Polyvinyl chloride (PVC)
Frequency: 40 kHz
Range (distance from sensor to liquid): Minimum 2 ft (0.6 m); Maximum 12 ft (3.7 m)
Span: 0 to 10 ft (0 to 3 m)
Blanking distance: 2 to 12 ft. (0.6 to 3.7 m)
Level Measurement Accuracy - at 22°C (72°F), still air, 40 to 70% humidity. Head change is actual change in vertical distance from ultrasonic sensor to liquid surface)
for head change <1.0 ft (<0.31 m): maximum error is ±0.02 ft. (±0.006 m)
for head change of 1.0 to 10 ft (0.31 to 3.05 m): maximum error is ±0.03 ft. (±0.009 m)
Temperature coefficient: Maximum error over compensated temperature range (per degree of temperature change) ±0.000047 x D per °F (±0.000085 x D per °C) where D is the distance from the transducer to the liquid surface

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