The 4200 Series offers a choice of battery-powered, portable operation or AC power. Housed in rugged, NEMA 4 enclosures, the 4200s can store weeks of data in their large, versatile memory. They're fully compatible with our Flowlink Software, and also have a built-in printer for on-site reports. A choice of four measurement technologies lets you match the meter to your site conditions. Options include modems with dial-out alarm as well as rain gauges and water quality monitoring.
Ultrasonic level measurement - non-contacting sensor means no scheduled maintenance.
Submerged probe accuracy unaffected by wind, steam, foam, turbulence or air temperature change.
Bubbler level sensing provides the most accurate measurement.
Area Velocity - no weir or flume needed! Handles submerged, surcharged, and reverse flow.
Ultrasonic level measurement - non-contacting sensor means no scheduled maintenance.
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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.
Standard Features
Applications
Options and Accessories
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Specifications
| Size (H x W x D): | 17.0 x 11.5 x 10.5 in. (43 x 29 x 26.7 cm) (without power source) |
| Weight: | 17.3 lbs (7.8 kg) (without power source) |
| Material: | High-impact molded polystyrene structural foam |
| Enclosure: | NEMA 4X (iP65) |
| Power: | 12 to 14V DC, 24 mA average at 12.5V DC |
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Typical Battery Life (printer set at 1 in/hr, 1 minute level reading interval) |
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| 934 NiCad Battery: | 7 to 8 days |
| 946 Lead-Acid Battery: | 10 to 12 days |
| 948 Lead-Acid Battery: | 2 to 2½ months |
| Program Memory: | Non-volatile, programmable flash. Updateable without opening enclosure. |
| Display: | Backlit LCD, 2-line, 80-character (5.5 mm high x 3.2 mm wide) |
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Level-to-Flow Rate Conversions |
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| Weirs: | V-notch, rectangular with and without end contractions, Cipolletti |
| Flumes: | Parshall, Palmer-Bowlus, Leopold-Lagco,Trapezoidal, H, HS, HL |
| Manning Formula: | Round, U-channel, rectangular, trapezoidal Data Points Four sets of 50 level-flow rate points Equation Two-term polynomial |
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Totalizers |
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| LCD: | 9-digit, floating decimal point, resettable |
| Mechanical (optional): | 7-digit, non-resettable |
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Inputs and outputs |
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| Rain Gauge Input: | Contact closure, normally open. Resolution 0.01 or 0.004 in ( 0.25 or 0.1 mm) |
| 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) |
| Sampler Activation Conditions: | Enabled, disabled, AND and OR combinations of any two of level, flow rate, rainfall, pH, DO, conductivity, and temperature |
| Sampler Pacing Output: | 12V pulse |
| Sampler Input: | Event mark, bottle number |
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Printer |
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| Recording Modes: | Up to 3 graphs of level, flow rate, pH, DO, conductivity, and temperature vs time; includes totalized flow. Rainfall and sampler events (time and bottle number) are also recorded |
| Speed: | Off, 0.5, 1, 2, 4 in/hr (1.25, 2.5, 5, 10 cm/hr) |
| Recording Span: | User selectable with multiple over-ranges |
| Resolution: | 1/240 of recording span |
| Reports Printed: | Flow meter program, 2 independent time interval reports, flow meter history, sampler history |
| 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 |
| Character Size (HxW): | 0.09 x 0.07 in (2.4 x 1.7 mm) |
| Paper: | 4.5 in. wide x 65 ft. (11.4 cm x 19.8 m), plain white paper, replaceable roll |
| Ribbon: | 19.7 ft. (6.0 m) black nylon, replaceable |
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Data Storage Memory |
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| Capacity: | 80,000 bytes (approx. 40,000 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 3,000 sample events. Optional expansion to 473,000 bytes (approx 236,500 readings) |
| Setup and Data Retrieval: | IBM PC or compatible computer with Isco Flowlink 4 for Windows |
| Communication: | Direct connection, optional internal 2400 baud telephone modem with voice messaging |
| Data Retrieval (optional): | Isco 581 Rapid Transfer Device (RTD) |
| 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 |
| 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 |
| Relay Outputs: | 2 form C relays with field selectable trip points based on flow rate (with optional High/Low Alarm Relays) |
| 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 |
| Storage Temperature: | -40° to 140°F (-40° to 60°C) |
| Operating Temperature: | 0° to 140°F (-18° to 60°C) |
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Ultrasonic Sensor |
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| Length x diameter: | 6.9 x 3.6 in (17.5 x 9.1 cm) |
| Cable Lengthxdiameter: | 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 |
| 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) |
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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) |
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| 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 |
| 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) |
Submerged probe accuracy unaffected by wind, steam, foam, turbulence or air temperature change.
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The probe on the Isco 4220 uses a differential pressure transducer to measure the depth of the liquid. The probe accurately senses pressure even when covered with silt and sand, and the venting system automatically compensates for changes in atmospheric pressure. This technology provides accurate measurement at sites where wind, steam, foam, turbulence, or air temperature fluctuations exist.
Standard Features
Applications
Options and Accessories
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Specifications
| Size (H x W x D): | 17.0 x 11.5 x 10.5 in. (43 x 29 x 26.7 cm) (without power source) |
| Weight: | 17.3 lbs (7.8 kg) (without power source) |
| Material: | High-impact molded polystyrene structural foam |
| Enclosure: | NEMA 4X (iP65) |
| Program Memory: | Non-volatile, programmable flash. Updateable without opening enclosure. |
| Display: | Backlit LCD, 2-line, 80-character (5.5 mm high x 3.2 mm wide) |
| Storage Temperature: | -40° to 140°F (-40° to 60°C) |
| Operating Temperature: | 0° to 140°F (-18° to 60°C) |
| Power: | 12 to 14V DC, 24 mA average at 12.5V DC |
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Typical battery life (printer set at 1 in/hr, 1 minute level reading interval) |
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| 934 NiCad Battery: | 8 to 11 days |
| 946 Lead-Acid Battery: | 12 to 16 days |
| 948 Lead-Acid Battery: | 21/2 to 3 months |
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Submerged probe |
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| Dimensions: | 9.5 x 0.875 in (24.1 x 2.2 cm) |
| Cable: | Standard range probe - 25 ft x 0.3 in (7.6 m x 0.8 cm); |
| Level Measurement Method: | Submerged pressure transducer mounted in the flow stream |
| Transducer Type: | Differential linear integrated circuit pressure transducer |
| Operating Temperature: | 32° to 160°F (0° to 71°C) |
| Compensated Temperature: | 32° to 100°F (0° to 38°C) |
| Level Measurement Range: | 0.1 to 10 ft (0.03 to 3.05 m) |
| Maximum allowable level: | 20 ft (6.1 m) |
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Level Measurement Accuracy (at 25°C (77°F) - Max error (±) for indicated level range) |
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| 0.1 to 5.0 ft (0.03 to 1.52 m): | ±0.01 ft (±0.003 m) |
| 0.1 to 7.0 ft (0.03 to 2.13 m): | ±0.03 ft (±0.009 m) |
| 0.1 to 10 ft (0.03 to 3.05 m): | ±0.10 ft (±0.03 m) |
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Temperature Coefficient (Maximum error per degree of temperature change over compensated range) |
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| 0.1 to 4.0 ft (0.03 to1.22m): | ±0.005ft/°F (±0.0027m/°C) |
| 4.0 to 10 ft (1.22 to 3.05m): | ±0.007ft/°F (±0.0038m/°C) |
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Materials |
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| Submerged probe: | Type 316 stainless steel, chlorinated polyvinyl chloride (CPVC) |
| Cable: | Polyvinyl chloride (PVC) |
Bubbler level sensing provides the most accurate measurement.
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Isco 4230 Bubbler Flow Meters use an internal air compressor to force a metered amount of air through a bubble line submerged in the flow channel. By measuring the pressure needed to force air bubbles out of the line, the flow level is accurately determined.
Standard Features
Applications
Options and Accessories
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Specifications
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4230 Bubbler Flow Meter |
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| Size (H x W x D): | 17.0 x 11.5 x 10.5 in. (43 x 29 x 26.7 cm) (without power source) |
| Weight: | 17.3 lbs (7.8 kg) (without power source) |
| Material: | High-impact molded polystyrene structural foam |
| Enclosure: | NEMA 4X (iP65) |
| Power: | 12 to 14V DC, 16 mA average at 12.5V DC |
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Typical Battery Life (printer set at 1 in./hr (2.5 cm/hr), 1 bubble per second, 15 minute purge, and continuous level reading interval) |
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| 934 Nickel-Cadmium Battery: | 7 to 10 days |
| 946 Lead-Acid Battery: | 10 to 15 days |
| 948 Lead-Acid Battery: | 2 to 3 months |
| Program Memory: | Non-volatile, programmable flash. Updateable without opening enclosure. |
| Display: | Backlit LCD, 2-line, 80-character (5.5 mm high x 3.2 mm wide) |
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Level-to-Flow Rate Conversions |
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| Weirs: | V-notch, rectangular with and without end contractions, Cipolletti |
| Flumes: | Parshall, Palmer-Bowlus, Leopold-Lagco,Trapezoidal, H, HS, HL |
| Manning Formula: | Round, U-channel, rectangular, trapezoidal Data Points Four sets of 50 level-flow rate points Equation Two-term polynomial |
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Totalizers |
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| LCD: | 9-digit, floating decimal point, resettable |
| Mechanical (optional): | 7-digit, non-resettable |
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Inputs and outputs |
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| Rain gauge input: | Contact closure, normally open. Resolution 0.01 or 0.004 in ( 0.25 or 0.1 mm) |
| 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) |
| Sampler activation conditions: | Enabled, disabled, AND and OR combinations of any two of level, flow rate, rainfall, pH, DO, conductivity, and temperature |
| Sampler pacing output: | 12V pulse |
| Sampler input: | Event mark, bottle number |
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Printer |
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| Recording modes: | Up to 3 graphs of level, flow rate, pH, DO, conductivity, and temperature vs time; includes totalized flow. Rainfall and sampler events (time and bottle number) are also recorded |
| Speed: | Off, 0.5, 1, 2, 4 in/hr (1.25, 2.5, 5, 10 cm/hr) |
| Recording Span: | User selectable with multiple over-ranges |
| Resolution: | 1/240 of recording span |
| Reports Printed: | Flow meter program, 2 independent time interval reports, flow meter history, sampler history |
| 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 |
| Character Size (HxW): | 0.09 x 0.07 in (2.4 x 1.7 mm) |
| Paper: | 4.5 in. wide x 65 ft. (11.4 cm x 19.8 m), plain white paper, replaceable roll |
| Ribbon: | 19.7 ft. (6.0 m) black nylon, replaceable |
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Data Storage Memory |
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| Capacity: | 80,000 bytes (approx. 40,000 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 3,000 sample events. Optional expansion to 473,000 bytes (approx 236,500 readings) |
| Setup and Data Retrieval: | Windows-compatible computer with Isco Flowlink Software |
| Communication: | Direct connection, optional internal 2400 baud telephone modem with voice messaging, or optional internal short haul modem |
| Data Retrieval (optional): | Isco 581 Rapid Transfer Device (RTD) |
| 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 |
| 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 |
| Relay Outputs: | 2 form C relays with field selectable trip points based on flow rate (with optional High/Low Alarm Relays) |
| 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 |
| Storage Temperature: | -40° to 140°F (-40° to 60°C) |
| Operating Temperature: | 0° to 140°F (-18° to 60°C) |
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Bubbler |
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| Range: | 0.1 to 10 ft (0.03 to 3.05 m) |
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Level Measurement Accuracy (Non-linearity, repeatability, and hysteresis at 25°C (77°F). Max error (±) for indicated level range. |
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| 0.1 to 5.0 ft (0.03 to 1.52 m): | ±0.005 ft (±0.002 m) |
| 0.1 to 7.0 ft (0.03 to 2.13 m): | ±0.01 ft (±0.003 m) |
| 0.1 to 10 ft (0.03 to 3.05 m): | ±0.035 ft (±0.011 m) |
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Temperature Coefficient (Maximum error (±) per degree of temperature change over compensated range) |
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| For level in feet: | ±0.0003 x level x temperature change from 72°F |
| For level in meters: | ±0.0009 x level x temperature change from 22°C |
| Automatic Drift Correction: | After a 5 minute warm-up period, zero level is corrected to ±0.002 ft. (±0.0006 m) at intervals between 2 and 15 minutes |
| Long-Term Level Calibration Change: | Typically 0.5% of reading per year |
| Ambient Operating Temperature Range: | 0° to 140°F (-18° to 60°C) |
| Compensated Temperature Range: | 32° to 140°F (0° to 60°C) |
Area Velocity - no weir or flume needed! Handles submerged, surcharged, and reverse flow.
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The sensor on the Isco 4250 uses patented Doppler technology to directly measure average velocity in the flow stream. An integral pressure transducer measures liquid depth to determine flow area. The 4250 then calculates flow rate by multiplying the area of the flow stream by its average velocity.
Standard Features
Applications
Options and Accessories
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Specifications
| Size (H x W x D): | 17.0 x 11.5 x 10.5 in. (43 x 29 x 26.7 cm) (without power source) |
| Weight: | 17.3 lbs (7.8 kg) (without power source) |
| Material: | High-impact molded polystyrene structural foam |
| Enclosure: | NEMA 4X (iP65) |
| Power: | 12 to 14V DC, 14 mA average at 12.5V DC |
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Typical Battery Life (printer set at 1 in/hr, 1 minute level reading interval, 5 minute velocity reading interval) |
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| 934 Nickel-Cadmium Battery: | 8 to 11 days |
| 946 Lead-Acid Battery: | 12 to 16 days |
| 948 Lead-Acid Battery: | 2½ to 3 months |
| Program Memory: | Non-volatile, programmable flash. Updateable without opening enclosure. |
| Display: | Backlit LCD, 2-line, 80-character (5.5 mm high x 3.2 mm wide) |
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Level-to-Area Conversions |
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| Channel shapes: | Round, U-shaped, rectangular, trapezoidal |
| Data points: | Four sets of 50 level-area points |
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Level-to-Flow Rate Conversions |
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| Weirs: | V-notch, rectangular, Cipolletti |
| Flumes: | Parshall, Palmer-Bowlus, Leopold-Lagco,Trapezoidal, H, HS, HL |
| Manning Formula: | Round, U-channel, rectangular, trapezoidal |
| Data Points: | Four sets of 50 level-flow rate points |
| Equation: | Two-term polynomial |
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Totalizers |
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| LCD: | Total, forward, and reverse flow; 9 digits each, floating decimal point, resettable |
| Mechanical (optional): | Total flow, 7 digits, non-resettable |
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Area Velocity Sensor (See separate specifications for low-profile sensor) |
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| Size (LxWxH): | 6.6 x 1.6 x 1.2 inches (16.8 x 4.1 x 3.0 cm) |
| Weight, incl. cable: | 2.1 lbs (0.96 kg) for standard probe with 25 foot cable; 3.9 lbs (1.8 kg) for extended range probe with 50 ft cable. |
| Ambient Operating Temperature Range: | 0° to 140°F (-18° to 60°C) |
| Compensated Temperature Range: | 32° to 140°F (0° to 60°C) |
| Materials: | Polybutadiene-based polyurethane, stainless steel; PVC and CPVC cable |
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Velocity Measurement |
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| Method: | Doppler Ultrasonic, 500 kHz |
| Velocity range: | -5 to +20 ft/s (-1.5 to 6.1 m/s) |
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Level Measurement |
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| Method: | Submerged pressure transducer |
| Standard range probe: | measurement range 0.05 to 10 ft (0.015 to 3.05 m); max level 20 ft (6.1 m) |
| Extended range probe: | measurement range 0.05 to 30 ft (0.015 to 9.14 m); max level 40 ft (12.2 m) |
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Standard probe accuracy (Non-linearity, repeatability, and hysteresis at 25°C (77°F). Max error for indicated level range. |
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| 0.033 to 5.0 ft (0.01 to 1.52 m): | ±0.008 ft/ft (±0.008 m/m) |
| >5.0 ft (>1.52 m): | ±0.012 ft/ft (±0.012 m/m) |
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Extended probe accuracy (Non-linearity, repeatability, and hysteresis at 25°C (77°F). Max error for indicated level range. |
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| 0.05 to 15 ft (0.015 to 4.57 m): | ±0.03 ft (±0.009 m) |
| 0.05 to 21 ft (0.015 to 6.4 m): | ±0.09 ft (±0.027 m) |
| 0.05 to 30 ft (0.015 to 9.14 m): | ±0.3 ft (±0.09 m) |
