Greyline is a worldwide leader in ultrasonic instrumentation for industrial and environmental markets. We develop, manufacture and market industrial flow and level monitoring instruments including ultrasonic level transmitters, flow meters and open channel flow meters. read more

Greyline’s primary market is environmental - especially water and wastewater treatment systems. Customers include industry and municipalities.

Modern research facilities at Greyline include closed pipe and open channel flow systems. With years of steady growth, Greyline products are sold and supported worldwide.

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Flow Meters ()
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Level Instruments ()
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Greyline Instruments Stingray 2.0 Ultrasonic Flow Logger
Compact, battery-powered ultrasonic flow logger for flow monitoring through open channels, partially full sewer pipes and surcharged pipes
$3,575.00
Greyline Instruments DFM 5.1 Doppler Flow Meter
Non-contact ultrasonic meter accurately displays, transmits, totalizes and controls flow from outside the pipe
$2,275.00
In Stock
Greyline Instruments PTFM 1.0 Ultrasonic Flow Meter
Portable transit time flow meter for accurate flow measurements of clean liquids with less than 2% solids or gas bubbles
$4,295.00
In Stock
Greyline Instruments TTFM 6.1 Ultrasonic Flow Meter
Transit time non-contact flow meter for use with clean, non-aerated liquids like water, chemicals, and oils in full pipes
$2,645.00
Greyline Instruments AVFM 5.0 Ultrasonic Flow Meter
Displays, transmits and totalizes flow through open channels, partially filled pipes and surcharged pipes without a flume or weir
$3,175.00
In Stock
Greyline Instruments DFS 5.1 Doppler Flow Switch
Precision flow control from the outside of metal or plastic pipes
$760.00
In Stock
Greyline Instruments PDFM 5.1 Doppler Flow Meter
Doppler flow meter for flow troubleshooting, balancing and checking performance of permanent flow meters
$4,145.00
Greyline Instruments OCF 5.0 Open Channel Flow Monitor
Continuously monitor, display, totalize and data log flow through any flume or weir
$2,175.00
Greyline Instruments SLT 5.0 Level & Flow Monitor
Non-contact ultrasonic system used to measure & control liquid level or monitor & totalize open channel flow through any flume or weir
$1,675.00
In Stock
Greyline Instruments LIT25 Level Transmitter
Non-contacting ultrasonic sensor that accurately displays, controls and transmits level
$975.00
Greyline Instruments PT400 Ultrasonic Flow Meter
Portable transit time flow meter is ideal for spot checks or for extended operation as a 4-20mA flow transmitter
$3,795.00
Greyline Instruments MantaRay Ultrasonic Flow Monitor
Portable, battery-powered open channel flow meter with 4-20mA and relay outputs for connection to samplers, SCADA and telemetry systems
$4,595.00
Greyline Instruments ISM 5.0 Insertion Magmeter
Magnetic flow meter with simplified hot tap insertion design measures the flow of water and conductive liquids in full pipes from 3 to 72"
$2,295.00
Greyline Instruments DLT 2.0 Differential Level Transmitter
Differential level and control plus open channel flow monitoring with two non-contacting ultrasonic sensors
$2,795.00
Greyline Instruments DFM 6.1 Doppler Flow Meter
Non-contact ultrasonic meter accurately displays, transmits, totalizes and controls flow from outside the pipe
$2,445.00
Greyline Instruments PSL 5.0 Level Controller
Pump and lift station level controller with 6 independently programmable control relays
$1,975.00
Greyline Instruments PZ15 Level Sensor
Non-contacting ultrasonic level sensor is small enough for very small flumes and powerful enough for really large applications.
$425.00
Greyline Instruments PZ32T Level Sensor
Non-contact, PVC and Teflon level sensor with 32 foot range with liquids
$425.00
Greyline Instruments SE4-A Velocity Sensor
Clamp-on Doppler velocity sensor
$475.00
Greyline Instruments VSJ Series Mounting Bands
Provides easy mounting for submersible sensors inside of round pipes
$150.00
Greyline Instruments CC Coupling Compound
Acoustic couplant is gel applied to the sensor face to ensure a complete acoustic pathway between the sensor and the pipe wall
$25.00
Greyline Instruments PM Enclosure Panel Mount Flange Assembly
$95.00
Greyline Instruments SE16B Ultrasonic Transducer
Single clamp-on transit time ultrasonic transducer (two are required for use)
$475.00
In Stock
Greyline Instruments PZ15-LP Level Sensor
Low profile, non-contacting ultrasonic level sensor ideal for confined spaces and small flumes
$425.00
Greyline Instruments VD Series Pipe Dams
Maintains low flow water level at 1” or higher as required for ultrasonic level measurement.
$150.00
Greyline Instruments QZ02L-SS-SD Velocity & Level Sensor
316 stainless steel submersible ultrasonic sensor, continuously measures both velocity and level in the channel
$675.00
Greyline Instruments XC Sensor Cable
RG62AU coaxial cable available in lengths up to 500 feet
$30.00
Greyline Instruments PSE4 Ultrasonic Sensor
Clamp-on Doppler sensor for ultrasonic flow measurements
$475.00
Greyline Instruments QZ02L-DP Velocity Sensor
Submersible ultrasonic sensor continuously measures stream velocity in the channel
$525.00
In Stock
Greyline Instruments QZ02L-SS-01-PS Velocity & Level Sensor
Submersible, ultrasonic sensor continuously measures both velocity and level in the channel
$750.00
Greyline Instruments SP1 Surge Protection
Lightning / surge protector in NEMA4 steel enclosure for use with the OCF 5.0 open channel flow monitor
$585.00
Greyline Instruments PZ34 Level Sensor
Non-contact, PVC level sensor with 32 foot range with liquids
$550.00
Greyline Instruments JB2X Sensor Cable Junction Box
NEMA4X/IP66 polycarbonate junction box for extending sensor cable lengths
$45.00
Greyline Instruments PT Ultrasonic Transducers
Clamp-on transit time ultrasonic transducers
$695.00
Greyline Instruments PZ32TE Level Sensor
Non-contact, Teflon level sensor with 32 foot range in liquids
$575.00
Greyline Instruments PXC4 Sensor Cable Extension
50-foot sensor cable extension with connectors
$150.00
Greyline Instruments DXC Sensor Cable
RG174U shielded coaxial pair available in lengths up to 500 feet
$87.50
Greyline Instruments JB Sensor Cable Junction Box
Junction box for extending pressure sensor cable lengths
$45.00
Greyline Instruments VXC Sensor Cable
Submersible, tri-coaxial cable available in lengths up to 500 feet
$225.00
Greyline Instruments CHS Spare Electronics Set
Spare set electronics with mounting chassis (standard features)
$650.00
Greyline Instruments Hardware Installation Kits
Standard and hot tap installation kits for Greyline Instruments ISM 5.0 insertion magmeter
$80.00
Greyline Instruments SCR Enclosure Sunscreen
Enclosure Sunscreen (iridite aluminum)
$28.00
Greyline Instruments SMS Sensor Mounting Stand
Sensor Mounting Stand (for Open Channel applications) for the OCF 5.0 Open Channel Flow Monitor
$195.00
Greyline Instruments Sensor Cable Extension
50 foot submersible, tri-coaxial sensor cable extension with watertight connectors
$275.00
Greyline Instruments PTC Transducer Cables
Replacement pair of coaxial transducer cables with BNC connectors and seal jackets
$95.00
Greyline Instruments Transducer Cables
Replacement pair of triaxial cables with BNC connectors and seal jackets
$196.00
Greyline Instruments MNL Additional Manuals
Additional Manuals (One supplied with each unit)
$10.00
Greyline Instruments PZS Sensor Sunscreen
Sensor Sunscreen (iridite aluminum)
$12.00
Greyline Instruments XCPT Sensor Cable
18AWG shielded cable for threaded pressure sensors, available in lengths up to 500 feet
$12.50
Greyline Instruments JB4X Cable Junction Box
NEMA4X/IP66 polycarbonate junction box for extending cable lengths of dual sensor installations
$55.00
Greyline Instruments Grounding Rings and Probes
Grounding rings and probes for installations involving non-metallic or lined pipes
$125.00
Greyline Instruments SBMS Sensor Submergence Shield
Sensor Submergence Shield (PVC)
$150.00
Greyline Instruments PTSC Transducer Cables
Replacement pair of coaxial transducer cables with locking connectors
$165.00
Greyline Instruments XCPS Sensor Cable
Extra cable for submersible pressure sensors, available in lengths up to 500 feet
$350.00
Greyline Instruments Remote Displays
Remote display for use with the Greyline ISM 5.0 insertion magmeter
$525.00
Greyline Instruments PS Series Pressure Sensors
Two wire, 4-20mA output, gauge type pressure sensor available in submersible or threaded models
$585.00