Liquids and gases play a considerable part in the results of quality control and operational safety e.g. coolant supply flow, lubricant supply flow and ventilation systems, thus it is important to monitor that these media are in sufficient quantities, at the right time, at the right place.

flow measuring systems using impeller sensors

200 series

Flow measuring system for closed pipes with “T” mount PVC impellers, that feature a six bladed impeller design with a non magnetic sensing mechanism connected to a 4-20mA transmitter, and an optional remote digital meter/controller with multipple choice of outputs (2/4 transistor relays, 0-10V/4-20mA, RS232/RS485, Profibus, DeviceNet).

Six bladed impeller PVC Tee flow sensors
Also available in brass/bronze, and stainless steel sensors

together with the relevant metal Tees,as well as special versions for underground installations.

Accuracy 1% of the max range (0.3-9.0m/sec)
Linearity 1% of the max range
PVC Tee available for 1 ½, 2, 3, 4” pipes (or threaded fittings for large diameter pipes),

SIGMA ST Series Compact Ultrasonic Clamp on type flow meter

measuring without contact with the liquids

Description
Sigma ST is very unique in its structural design. It uses a circular magnetic steel to achieve automatic connection during installation. It takes only 2-3 minutes to complete the whole process from installation to measurement. It also adopts the current popular OLED display, which makes it easy to read in low light conditions.

Sigma ST series flow meters offer users easy installation, no process downtime, no pressure loss or leak and no contamination of the medium to be measured.

Features
● With the world's most advanced time measurement chip (time resolution of SOps), a new
generation of stable flow meters has been developed
● The flow meter is fitted on the outside of the tube without additional pipe interventions required
● No expertise required, installation and measurement can be done according to the operating instructions
● No moving parts, no pressure loss. The flow meter can be installed without stopping production

Characteristics
Flow Range: 0.1 m/s~5.0 m/s
Accuracy: ±2.0%
Repeatability: 0.8%
Pipe Size: Φ6.35 ~ Φ90
Sigma ST holds statistics of daily, monthly, and annual consumption over a long period of time.
Flow Totalizer
Analogue Output: 4~20mA, Maximum load: 600Ω
Alarm Output: OCT, Upper and lower limit alarm function (optional)
Communication: RS485, support Mod bus communication protocol
Power Supply: 24 VDC
Cable Length: 2.0m
Keypad: Four light touch buttons
Screen: OLED 128*64 display screen
Units: Metric and imperial units are available, Cubic Meters(m³), Liters(L), USA Gallons(GAL)/hour, /min, Default unit setting: m³/h
Totalizer: Six bit digit
Piping Material: Stainless steel pipe, carbon steel pipe, copper pipe, plastic pipe
Housing Material: Aluminum alloy
Environment Temp. : 0℃~50℃(32°F~122°F)
Medium Temp. : 0℃~50℃(32°F~122°F)
Environment Humidity: 0-95% relative humidity, without condensation
IP rating: IP54

Applications
• Treated Water
• Water distribution flow metering
• Building Services
• Sea water
• Leak Detection
• Power/Energy Management
• Food/Hygienic flow-monitoring
• Cooling Water
• Chemical / Pharmaceutical
• Alcohols
• Chemical solvents
• Acids
• Pump inspection
• Hydraulic Oil
• Low-Conductivity Water
• Water / Glycol Solutions
• Diesel
• Survey work
Also used in the production to measure water and other liquids throughout the facility.

Technical Data
Model: SIGMA ST Series
Flow Range: 0.1 m/s~5.0 m/s
Accuracy: ±2.0%
Repeatability: 0.8%
Pipe Size: Φ6.35 ~ Φ90
Data Storage: Daily, monthly, and Annual. Flow Totalizer
Analog Output: 4~20mA, Maximum load: 600Ω
Alarm Output: OCT, Upper and lower limit alarm function (optional)
Communication: RS485, support Mod bus communication protocol
Power Supply: 24 VDC
Cable Length: 2.0m
Keypad: Four light touch buttons
Screen: OLED 128*64 display screen
Units: Metric and imperial units are available, Cubic Meters(m³), Liters(L), USA Gallons(GAL)/hour, /min, Default unit setting: m³/h
Totalizer: Six bit digit
Piping Material: Stainless steel pipe, carbon steel pipe, copper pipe, plastic pipe
Case Material: Aluminum alloy
Environmental Temp.: 0℃~50℃(32°F~122°F)
Medium Temp.: 0℃~50℃(32°F~122°F)
Environment Humidity: 0-95% relative humidity, without condensation
IP rating: IP54

Also available with optional remote display

Sigma 226 Series

Transit Ultrasonic Wall Mounted Flow Meter

Flow range: 0.03m/s-10m/s
Accuracy: ±1% of measured value
Repeatability: 0.2%
Screen: LCD 240*128 with backlight
Power supply: 10-36 VDC or 90-245V AC
Transmitter housing: IP65, ABS
(Temperature: -20℃~60℃)
Output: OCT pulse output 0-10KHz, 4-20mA, Relay
Communication: RS485
Duct size range: 25mm-1200mm
Sensor Type: clamping
Degree of protection: IP68
Cable length: 5 meters/pc
Sensor operating temperature: -40℃ ~ +80℃
It supports SD card

Please note that Transit type ultrasonic flow meters are for applications in closed full pipes, and liquids with < 2% solids or bubbles

Sigma 6100-EP series

Doppler Portable Ultrasonic Flow Meter

Sigma 6100-EP is a Doppler Portable Ultrasonic Flow Meter designed to measure volumetric flow in full pipes containing bubbles or suspended particles larger than 100 microns and in concentrations not less than 75ppm.
Sigma 6100-EP can display flow rate, has a flow totalizer, a 4-20mA output, Relays for Totalizer and Alarm outputs.

Features
Rechargeable battery can work up to 50 hours
It is suitable for pipe sizes ranging from 40 to 4000mm
For for difficult liquids, corrosive chemicals, viscus liquids, wastewater, slurries, sludge, that contain bubbles or suspended particles larger than 100 microns and in concentrations not less than 75ppm.
Excellent low flow rate measurement ability, low to 0.05m/s
A wide range of flow measurement, high flow rate can reach 12m/s
High-temperature transducer is suitable to liquids of -35℃ ~ 200℃
Do not need to shut down the pipe flow when installing the transducers
User-friendly configuration
4-20mA, Relay Totalizer and Relay Alarm outputs
Accuracy: 2.0% Calibrated span

Technical Parameters：

Transmitter
Measurement principle: Doppler ultrasonic
Resolution: 0.50mm/s
Repeatability: 0.2% of reading
Accuracy: 0.5% -- 2.0% F.S.
Response time: 2-60s for optional
Flow Velocity Range: 0.05- 12 m/s
Liquid Types Supported: Liquids containing 100ppm of reflectors and at least 20% of the reflectors are larger than 100 micron.
Power Supply: AC: 85-265V , DC:24V/500mA
Enclosure type: Portable
Protection rating: IP65
Operating temperature: -20℃ to +60℃
Housing material: ABS
Measurement Channels: 1
Display: 2 line × 8 characters LCD, 8-digit rate or 8-digit total (resettable)
Units: User Configured (Imperial and Metric)
Rate: Rate and Velocity Display
Totalizer: gallons, ft³, barrels, lbs, liters, m³,kg
Communication: 4-20mA,relays for Totalizer and alarm output
keypad: 6pcs buttons
Size: Transmitter:235X125X45mm case:410X320X80mm
Weight: 3kg

Transducer
Transducers Type: Clamp-on
Protection rating: IP65
Max Liquid Temperature:Std. Temp.: -35℃~85℃ for short periods up to 120℃
High Temp.: -35℃~200℃ for short periods up to 250℃
Pipe diameter range: 40-4000 mm
Transducer Size: 60(h)*34(w)*33(d)mm
Material of transducer: Aluminum for standard temp. sensor, peek for high temp. sensor
Cable Length: Std: 5m