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Ultrasonic Flow Meters:

DFM 5.1 Doppler Flow Meter

DFM 5.1 Doppler
Flow Meter

Product details
PDFM 5.1 Portable Doppler Flow Meter

PDFM 5.1 Portable
Doppler Flow Meter

Product details
TTFM 1.0 Transit Time Flowmeter

TTFM 1.0 Transit
Time Flowmeter

Product details
PTFM 1.0 Portable Transit Time Flow Meter

PTFM 1.0 Portable
Transit Time Flow Meter

Product details
DFS 5.1 Doppler Flow Switch

DFS 5.1 Doppler
Flow Switch

Product details
SFM 6.1 Ultrasonic Slurry Flow Meter

SFM 6.1 Ultrasonic
Slurry Flow Meter

Product details
ISM 5.0 Insertion Magmeter

ISM 5.0 Insertion Magmeter

Product details
Portaflow PT400 Portable Transit Time Flow Meter

Portaflow PT400
Portable Transit Time Flow Meter

Product details

Open Channel Flow:

Stingray 2.0 Portable Level-Velocity Logger

Stingray 2.0 Portable
Level-Velocity Logger

Product details
MantaRay Portable Area-Velocity Flow Meter

MantaRay Portable
Area-Velocity Flow Meter

Product details
AVFM 5.0 Area-Velocity Flow Monitor

AVFM 5.0 Area-Velocity
Flow Monitor

Product details
OCF 5.0 Open Channel Flow Monitor

OCF 5.0 Open Channel
Flow Monitor

Product details

Level Monitoring:

DLT 2.0 Differential Level Transmitter

DLT 2.0 Differential
Level Transmitter

Product details
SLT 5.0 Ultrasonic Level and Flow Monitor

SLT 5.0 Ultrasonic Level
and Flow Monitor

Product details
LIT25 Level Indicating Transmitter

LIT25 Level
Indicating Transmitter

Product details
PSL 5.0 Hybrid Pump Station Level Controller

PSL 5.0 Hybrid
Pump Station Level Controller

Product details

Ultrasonic Level

Ultrasonic Level

Greyline ultrasonic sensors are mounted at the top of a tank or in a position above the liquid being measured. The sensor continuously transmits pulses of high frequency sound (typically 42 kHz) which travel away from the sensor, hit the surface of the liquid and return to the sensor.

The instrument electronics measure the time it takes from transmitted sound to return of the echo. With reference to the speed of sound in air, the exact distance of the liquid surface from the sensor can be calculated with high accuracy (±0.25% of maximum range).

Since the speed of sound is affected by air temperature, Greyline ultrasonic level sensors include a built-in temperature sensor. Level/distance measurements are automatically temperature compensated throughout the operating temperature range of the sensor.

The sensor should be positioned so that it has a clear "view" of the liquid surface and away from ladders, pipes or other obstructions. Greyline recommends 1 ft. from the sidewall for every 10 ft. depth (300 mm for every 3 m depth). False echoes from agitators (sweeping under the sensor), turbulence and waves can be filtered and disregarded by the instrument.

Greyline models range from simple 4-20mA level indicating transmitters, to sophisticated monitoring, controlling and data logging models. Return to Greyline Products for Level model details and specifications. For information on a wide range of level instrument technologies including ultrasonics, read Wastewater Level Measurement Techniques.

Application Note - End-To-End Solutions for The Township of Edwardsburgh/Cardinal

From sewage pump stations in the collection system, through final treated effluent, the Township of Edwardsburgh/Cardinal deploys Greyline flow and level instruments...

   
DopplerforFlyAshSlurryFlow

Application Note - Doppler for Fly Ash Slurry Flow

Limestone Slurry is abrasive therefore in-line flowmeters are not practical. Non-contacting Doppler Flowmeters can be used both on the fly ash slurry supply lines and on "used" or recirculated slurry...

   
Non-Contacting Flow Meters for Dredging Slurry 

Case Study - Dredge Manufacturers Improve Operating Efficiency with Greyline Clamp-on Flow Meters 

Dredge operators need accurate real-time flow information to properly manage production. But dredging slurries are very abrasive and pumped at high velocity so flow measurement is difficult. Manufacturers find the solution with Greyline clamp-on flowmeters...

   
Solution for Acidic Flow Measurement

Case Study - Minera Escondida, Chile
Non-Contacting Flow Solution for Heap Leach Mining

The world's largest single producer of copper was faced with a challenge in their heap leaching process in the Atacama Desert of northern Chile. Finding an accurate, reliable non-contacting flow meter was a difficult task...

   
Thurston County Chooses Greyline Flow Meters

Thurson County, Washington
Comments on Greyline Flowmeters


Since 2007 Thurston County has deployed Greyline Area-Velocity Flow Meters in open channels resulting in thousands of dollars in savings every year. Read their comments here...

   
Pump Station Call Outs Solved

Case Study - Town of Eckville Stops Pump Station Call Outs With New PSL 5.0 Pump Station Level Controllers

Town operators were plagued by high level alarm call outs at two new sewage lift stations. Read how they used Greyline's hybrid ultrasonic level controllers with dual sensor capability to put an end to level alarms.

   
Clamp-on Sensors Solve Crude Oil Flow Problems

Case Study - Clamp-on Flowmeters
Solve Flow Problems At Crude Oil Battery Site

Wax and solids build-up were plugging off pipes and in-line flowmeters at this oil battery site in Alberta. Read how Petrobakken Energy solved the problem by switching to Greyline DFM 5.0 Doppler Flow Meters with non-contacting ultrasonic sensors.

   
Wastewater Level Measurement Techniques

Wastewater Level Measurement Techniques

Chapter 36 from the Wiley & Sons publication: Environmental Instrumentation and Analysis Handbook. This is an informative summary of applications and level instrumentation used in Wastewater Treatment Plants.

   
Golf Course Irrigation with Greyline TTFM 1.0 Transit Time Flowmeter

Case Study - Golf Course Irrigation
Flow Monitoring from Outside a Pipe

A new TTFM 1.0 Transit Time Flowmeter monitors and logs irrigation water pumped to sprinklers at Summerheights Golf Links. The clamp-on flowmeter is used to comply with a Ministry of Environment permit.

   
Irrigation Water Flow Meter

Case Study - Irrigation Water Flow Measurement 
For Open Channels and Partially Filled Pipes

Greyline AVFM Area-Velocity Flow Meters monitor and totalize irrigation water distributed through a network of canals, channels and pipelines in the United Irrigation District.

   
Submerged Flow Solution

Case Study - Solution for Irrigation Water
Flow Monitoring in Submerged Culverts

Greyline DFM 5.0 Doppler Flow Meters with waterproof ultrasonic sensors measure flow in submerged concrete culverts in the Raymond Irrigation District in Alberta, Canada.

   
Area-Velocity Flowmeters in Denmark 

Case Study - Area-Velocity Flowmeters in Denmark

Greyline AVFM Area-Velocity Flow Meters are installed thoughout the country by Teletronic Denmark to monitor municipal sewage and stormwater. Application photos and descriptions illustrate flow monitoring in manholes and open channels.

   
Quarry De-Watering Flowmeter 

Case Study - Quarry Dewatering Flowmeter
at the Bray Quarry in Eastern Ontario


A Greyline AVFM Area-Velocity Flow Meter monitors and data logs water discharged from the Bray Quarry to the South Raisin River. The Quarry is required to measure flow for environmental permit compliance.

   
Dear Greyline...

DLT 2.0 Differential Level Transmitter
Open letter from a Greyline customer

The septage receiving station in Whynott's Settlement, Nova Scotia needed a simple, compact solution to control VFD-driven vertical turbine pumps, chlorine injection plus flow through a V-Notch Weir with display and 4-20mA outputs... 
Solution: the Greyline DLT 2.0 Differential Level Transmitter

   
Troubleshooting with Portable Greyline Flowmeters

Case Study - Flowmeter Troubleshooting 
at The Township of North Glengarry


An Ontario municipality deploys Greyline portable flowmeters to solve flow rate discrepancies between a magmeter installed on the forcemain in their pump station and an open channel flowmeter at the sewage lagoon.

   
Greyline OCF for WWTP Influent Flow 

OCF 5.0 Open Channel Flow Monitors 
Monitor Infulent at Long Sault WWTP Plant


After 16 years of service, the Long Sault WWTP replaced two older Greyline Open Channel Flow Monitors with new data logging OCF 5.0 models. This SBR treatment plant's influent is measured with flow through two 6" Parshall Flumes.

   
Greyline SLT for Culligan Water Plant Tank Level 

SLT32 Ultrasonic Level Monitors
for Water Bottling Plant Level Control


Culligan Water installs Greyline SLT32 Level Monitors to control tank levels in their bottling plant in Calgary, Alberta. With non-contacting ultrasonic sensors the SLT32's control fill and discharge valves in five tanks containing spring water, reverse osmosis water and distilled water.
 

   
Water Accountability - Using Greyline Stingrays to Identify Excess Flow

Case Study - Water Accountability 
Portable Monitoring Instruments Solve Flow Rate Mystery


The Glen Walter Sewage Collection System was built to service 1,080 customers in 1989. At the time the population was 850 but by 1995 the sewage treatment plant had already reached capacity. Plant operators and the municipality had concerns about the excess flow...

   
Greyline Doppler for Sand Slurry Flow

DFM 5.0 Doppler Flow Meter
for Frac Sand Slurry Flow Monitoring


CanFrac Sands Ltd. of Lloydmister, Saskatchewan install a Greyline DFM 5.0 Doppler Flow Meter to measure fracturing sand slurry when their in-line flowmeters were being damaged by the  abrasive slurry.

   
Greyline AVFM for Lagoon Discharge Flow

AVFM 5.0 Area-Velocity Flow Meter  
Monitors Sewage Lagoon Discharge Flow

The Township of South Glengarry installs a new Greyline AVFM 5.0 Area-Velocity Flow Meter to measure continuous discharge from their municipal sewage lagoon. The sealed ultrasonic sensor is mounted in a horizontal 12" PVC pipe. The AVFM replaced a magnetic flowmeter that was unable to measure seasonal low flow rates.

   
Greyline LIT for Swimming Pool Level Control 

LIT25 Level Indicating Transmitter  
Controls Swimming Pool Level

A Surge Tank is used at the Okotokes Rec Centre Swimming Pool to regulate pool level. By monitoring level in a surge tank the non-contacting Greyline LIT25 Level Indicating Transmitter controls makeup water flow through a solenoid valve.  

   

 

 

  Visit Greyline in booth #301 at the Irrigation Show, November 6-10, 2017 at Orange County Convention Center in Orlando, Florida. Our full range of flow and level instruments plus new models will be on display.
Visit Greyline Instruments at the annual WEFTEC exhibition Visit Greyline in booth #4643 at the Water Environment Federation 90th Annual Technical Exhibition & Conference Sept 30 - Oct 4, 2017 at McCormick Place in Chicago, IL. Our full range of flow and level instruments plus new models will be on display. 
Visit Greyline in booth #22 at the Dredging Summit Visit Greyline in booth #22 at the Dredging Summit & Expo '17 June 26 - 29, 2017 at the Hyatt Regency in Vancouver, BC.

Our DFM 5.1 Doppler Flow Meter has become a popular instrument for measuring dredge slurry flow, and will be on display alongside the PDFM 5.1 Portable Doppler Flow Meter.

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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.

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. 

Canada

Greyline Instruments Inc. Canada
16456 Sixsmith Drive, Long Sault, Ont. K0C 1P0
Tel: 613-938-8956 • Toll Free: 855-300-9151
Fax: 613-938-4857 • E-mail: info@greyline.com

United States

Greyline Instruments Inc. United States
11451 Belcher Road South, Largo, FL 33773
Tel: 315-788-9500 • Toll Free: 888-473-9546
Fax: 315-764-0419 • E-mail:  info@greyline.com

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