Description
The Ultrasonic Flow Meter SFM 6.1 for Slurry works best in applications that would defeat regular contacting flow meters. Because the sensor is mounted on the outside of the pipe, it is unaffected by abrasive slurries or harsh chemicals. There is no obstruction to flow and no pressure drop.
Each SFM 6.1 Slurry Flow Meter includes a strap-on ultrasonic sensor, an adjustable stainless steel mounting clamp, and a sensor coupling compound. The sensor fits on the outside of any pipe diameter ½” (12.7 mm) or larger. It takes just a few minutes to install. There is no need to shut downflow.
Benefit
The SFM 6.1 Slurry Flow Meter works best in applications that would defeat regular contacting flow meters. Because the Sensor is mounted on the outside of the pipe, it is unaffected by abrasive slurries or harsh chemicals. There is no obstruction to flow and no pressure drop.
Easy to Install
Each SFM 6.1 Slurry Flow Meter includes a strap-on ultrasonic sensor, an adjustable stainless steel mounting clamp and sensor coupling compound. The sensor fits on the outside of any pipe diameter ½” (12.7 mm) or larger. It takes just a few minutes to install. There is no need to shut down flow.
Simple, Single-Head Sensor design
Ultrasonic signals are transmitted and received from a single-head sensor. The mounting clamp (included) ensures correct sensor alignment on horizontal or vertical pipes. The SFM 6.1 automatically self-tunes to the cable length up to 500 ft. (152 m).
Works on most Pipes
The Greyline SFM 6.1 Flow Meter measures flow in carbon steel, stainless steel, cast iron, PVC, fiberglass, and lined pipes… any pipe material that conducts ultrasound. Doppler signals cannot transmit through pipe walls which contain air pockets (e.g. concrete or wood), or loose pipe liners (with an air gap between the liner and pipe wall).
Backlit Matrix Display with Simple, 5-key Menu System
Calibration is easy with the new SFM 6.1 user-friendly menu system. Press the arrow keys to scroll through menus, change settings and enter calibration values. You can select English, Spanish or French menus, enable a password to protect settings and control brightness of the digital display.
Reverse Flow Measurement
The SFM 6.1 measures flow in either direction and displays positive or negative values. You can control the Totalizer to subtract reverse flow, or to totalize forward flow only. The 4mA setting can also be adjusted to a negative flow setting.
Optional Data Logger with USB Thumb Drive Support
Order your SFM 6.1 Slurry Flow Meter with an optional built-in 2 million point data logger. It includes Windows software to display flow charts and tables, and to create dynamic flow reports. Just plug in a standard USB flash drive and log files are downloaded automatically – and fast!
Greyline SFM 6.1 Feature :
- Optimized for Slurries
- Easy, Intuitive Set-Up
- 5 Button Menu System
- Isolated 4-20mA Output
- Up to 6 Control Relays
- Optional Built-In Data Logger
- Noise suppression circuitry filters “dirty” power and electrical interference from most VFD’s
- Automatically converts between measurement units (e.g. gallons or liters)
- Digital processing system tracks flow signals accurately and auto-zeroes with signal loss
- Self-tunes to Sensor cable length
- Output “simulation” function simplifies calibration of remote devices (e.g. chart recorders or controllers)
- Calibration data and Totalizer values are stored automatically during power interruptions
Principle of Operation
- The SFM 6.1 Sensor transmits continuous high frequency sound through the pipe wall into the flowing slurry
- Sound is reflected back to the Sensor from particles or gas bubbles in the liquid. If the liquid is flowing, the reflected sound returns at an altered frequency (the Doppler effect). The SFM 6.1 continuously
measures this frequency shift to accurately measure flow. - Enhanced Signal Processing for Reliable Accuracy
- The SFM 6.1 Doppler flow algorithm filters out background noise and interference. The high speed digital signal processor discriminates against weak and distorted signals for increased reliability and accuracy. If the processor cannot measure accurately the meter will display zero flow.
Specification
Flow Transmitter
- Flow Rate Range: ± 0.1 to 40 ft/sec (± 0.03 to 12.2 m/sec) in most applications
- Pipe Size: Any pipe ID from ½” to 180″ (12.7 mm to 4.5 m)
- Accuracy: ±2% of reading or 0.1 ft/sec (0.03 m/sec). Requires solids or bubbles minimum size
- of 100 microns, minimum concentration 75 ppm. Repeatability: ±0.1%, Linearity ±0.5%
- Display: White, backlit matrix – displays flow rate, relay states, 16-digit totalizer, operating
mode and calibration menu - Calibration: built-in 5-key calibrator with English, Spanish or French language selection
- Power Input: 100-240VAC 50-60Hz (see Options), 2.4-5.6 Watts depending on options
- Output: Isolated 4-20mA (1000 ohm load max.)
- Control Relays: Qty 2, rated 5 amp SPDT, programmable flow alarm and/or proportional pulse
- Enclosure: NEMA4 stainless steel with window
- Electronics Operating Temperature: -10° to 140°F (-23° to 60°C)
- Sensitivity: adjustable. Damping: adjustable
- Electrical Surge Protection: Sensor, 4-20mA output and AC power input
- Shipping Weight: 21 lbs (10 kg)
Ultrasonic doppler Sensors
- Model SE4 single-head ultrasonic with 20 ft (6 m) shielded cable and stainless steel mounting kit for pipes ½” (12.7 mm) ID or larger. Designed to withstand accidental submersion to 10 psi.
- Certified non-incendive for Class I Division 2, Groups A,B,C,D hazardous locations
- Sensor Operating Temperature: -40° to 300°F (-40° to 150°C)
Option
- Sensors: Intrinsic Safety Barriers for Sensor mounting in Class 1 Div.1 hazardous locations
- Sensor Cable: 50 ft. (15 m) or 100 ft. (30 m) continuous shielded coaxial pair, or splice up to 500 ft (152 m) with Junction Box. Self tunes to extended cable
- Enclosure Heater: for outdoor installation, 16 watt thermostatically controlled to -40°F (-40°C)
- Data Logger: Built-in 2 million point logger with USB output and Windows™ software
- Power input: 9-32VDC, 2.1-4.95 Watts depending on options
- Control Relays: 4 additional (6 total) rated 5 ampere SPDT
Application
- Recommended for: Limestone, gypsum, fly ash and bottom ash slurries and liquids containing suspended solids or bubbles, minimum size of 100 microns, minimum concentration 75 ppm.
- Sensor Mounting Location: 6-10 pipe diameters from elbows, tees (turbulence increasing devices) and >30 pipe diameters from pumps, controlling valves and pipe discharge. Sensor mounts on Vertical or Horizontal pipes.
- Pipe Materials: steel, stainless steel, cast iron, PVC, fiberglass, any contiguous pipe material that conducts sound, including lined pipes with liner bonded to pipe wall. Avoid pipes with loose insertion liners and pipe walls which contain air (concrete, wood etc.)
- The flow meter shall operate with a single-head flow sensor mounted externally on any contiguous pipe material that conducts sound including carbon steel, stainless steel, ductile iron, copper, FRP, PVC, ABS, or cement lined pipe from 1/2″ to 180″ (12.5 mm to 4.5 m) ID.
- Measure and indicate flow rates from +0.25 to +40 ft/sec and -0.25 to -40 ft/sec (+0.075 to +12.2 m/sec and -0.075 to -12.2 m/sec) with an accuracy of ±2% of reading on liquids with entrained particles or gases of 100 microns or larger and minimum concentrations of 75 ppm.
More Information : Brochure SFM 6.1
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