Detailed specs for all product lines
Construction & Materials
Performance
Principle of Working
Turbine flow meters are designed for the volumetric measurement of fluids. The meters are rugged, reliable and precise instruments suitable for all industrial chemicals, fuels and more.
The basic meter consists of a freely suspended bladed rotor positioned axially in the flow stream, with the flowing fluid pushing against the blades. The rotational speed of the turbine is proportional to the velocity of the fluid and hence truly represents the volume of fluid flowing through the meter.
The rotation of the turbine rotor generates electrical pulses in the pick-off attached to the flow meter housing. These output pulses are amplified and converted to measure flow rate and integration.
Construction & Materials
Performance
Principle of Working
The basic meter consists of a rotor or piston which rotates in a cylindrical housing. A barrier plate and rotary piston at any moment provides sealing between the inlet and outlet port. For every rotation of the rotor, one pulse is generated by a solid-state sensor provided outside the housing. The sensor output is fed to a microprocessor-based digital flow rate indicator cum totalizer.
In position A, liquid enters from the inlet port forcing the rotor to move away from the inlet port, resulting in the rotor occupying position B. Incoming liquid pushes the rotor further toward the outlet chamber (position C), resulting in discharge of liquid in the hollow rotor from the outlet chamber. The rotor then occupies position D, covering both inlet and outlet chambers. Liquid enters into the rotor, returning to the situation described in position A.
A magnet encapsulated in the rotor activates the solid-state sensor during every rotation.
Installation Notes
For failsafe and reliable operation, use a 25 micron cartridge or Y-type strainer on the inlet pipeline. Any fine particle entering the flow meter can prevent rotation of the rotor. Install the flow meter so that the proximity sensor is parallel to the ground.
Figure 1 — Sequence of Operation
Overview
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Overview
Ultrasonic flow meters work on the Transit Time (Time of Flight) principle. The flow meter unit utilises two transducers that function as both ultrasonic transmitter and receiver. The transducers are either clamped on or inserted into the outside surface of the closed pipes.
The transit time flow meter measures the time it takes for an ultrasonic signal transmitted from one transducer to cross the pipe and be received by the second transducer. The flow is then measured by comparing the upstream and downstream time of the ultrasonic signal. With no flow through the pipe, the transit time would be equal in both directions.
Principle of Working
For measuring the flow of the medium, two ultrasonic pulses are sent through the medium — one in the flow direction and the other in the opposite direction. The transit times of the two pulses are then measured.
The transit time difference Δt between these two pulses gives the average flow velocity on the propagation path of the ultrasonic signals. This can be used to obtain the average flow velocity on the cross section of the pipe, which is proportional to the volumetric flow.
Transducer Types
| Parameter | UFMc Handheld (Clamp On) | UFMc Wall Mount (Clamp On) | UFMi (Insertion) |
|---|---|---|---|
| Power supply | 3 AAA NiMH battery (12 hrs) / 100–240V AC | 24V DC / 110V AC / 240V | 24V DC / 110V AC / 240V |
| Velocity | ±12 m/sec. Bidirectional | ±12 m/sec. Bidirectional | ±12 m/sec. Bidirectional |
| Display | 4 lines, 16 char LCD — flow rate, velocity, totalizer | 2 lines, 16 char LCD — flow rate, velocity, totalizer | 2 lines, 16 char LCD — flow rate, velocity, totalizer |
| Units | User configurable, English/Metric | User configurable, English/Metric | User configurable, English/Metric |
| Totalizer | FWD, NET, REV, BATCH (Gallons, ft³, Barrels, lbs, m³) | FWD, NET, REV, BATCH | FWD, NET, REV, BATCH |
| Output | RS 232 | 4–20 mA DC (Standard) | 4–20 mA DC (Standard) |
| Accuracy | ±1% of reading @ rate >0.5 m/sec. | ±1% of reading @ rate >0.5 m/sec. | ±1% of reading @ rate >0.5 m/sec. |
| Repeatability | 0.2% of Span | 0.2% of Span | 0.2% of Span |
| Weight | <0.5 kg | <2.5 kg | <2.5 kg |
| Dimensions | 204×90×30 mm | 251×190×96 mm | 251×190×96 mm |
| Security | Keypad lockout, access code enabled | Keypad lockout, access code enabled | Keypad lockout, access code enabled |
| Parameter | UFMc Handheld (Clamp On) | UFMc Wall Mount (Clamp On) | UFMi (Insertion) |
|---|---|---|---|
| Suited temp. (Std.) | -40°C to 120°C | -40°C to 120°C | -40°C to 120°C |
| Suited temp. (High) | -40°C to 250°C | -40°C to 250°C | -40°C to 250°C |
| Pipe size (S) | 15–80 mm | 15–80 mm | 65mm – 1200mm |
| Pipe size (M) | 50–700 mm | 50–700 mm | |
| Pipe size (L) | 400–4570 mm | 400–4570 mm | |
| Dimensions (S) | 45×30×30 mm | 45×30×30 mm | 180mm with 20mm bore |
| Dimensions (M) | 60×45×45 mm | 60×45×45 mm | |
| Dimensions (L) | 80×70×55 mm | 80×70×55 mm | |
| Weight (S) | <0.3 Kg | <0.3 Kg | <1.5 kg |
| Weight (M) | <0.5 Kg | <0.5 Kg | |
| Weight (L) | <1.0 Kg | <1.0 Kg | |
| Cable length | 6m std. Extendable to 300m | 6m std. Extendable to 300m | 6m std. Extendable to 300m |
| Flexible belts | SS belt per pipe size | SS belt per pipe size | NA |
| Portable case | 463×383×103 mm | NA | NA |
Flow Rate Indicator + Totalizer
Six digit digital flow totalizer with battery backup. DIN 96×96 panel mounting, microprocessor based.
Batch Controller
Four/Six digit digital batch controller with 1CO relay output + six digit totalizer. Preset quantity with auto shut-off.
Flow Rate + Totalizer + Batcher
Combined flow rate, totalizer, and batch controller with 4–20mA output.
Optional features: RS485 output · 4–20mA output · Hi/Lo Alarm · Flameproof enclosure (CMRS approved)
Liquid flow ranges for turbine meters (at 1 cst viscosity)
| Size (NB) | Flow Range | End Connection |
|---|---|---|
| 15 mm | 10 – 30 LPM | Threaded |
| 20 mm | 20 – 60 LPM | Threaded |
| 25 mm | 30 – 90 LPM | Threaded |
| 40 mm | 60 – 240 LPM | C.S. Flanged |
| 50 mm | 125 – 500 LPM | C.S. Flanged |
| 65 mm | 200 – 800 LPM | C.S. Flanged |
| 80 mm | 300 – 1200 LPM | C.S. Flanged |
| 100 mm | 450 – 2000 LPM | C.S. Flanged |
| 150 mm | 1000 – 5000 LPM | C.S. Flanged |
Liquid flow ranges for PD meters (MOC: Al. Alloy/Brass with Delrin Rotor)
| Size | End Connection | Flow Range |
|---|---|---|
| 8mm | 1/4" BSP | 0.5 – 3.0 LPM |
| 12mm | 3/8" BSP | 1.0 – 6.0 LPM |
| 15mm | Flanged end | 2.0 – 15.0 LPM |
| 20mm | Flanged end | 4.0 – 30.0 LPM |
| 25mm | Flanged end | 6.0 – 50.0 LPM |
| 32 / 40 / 50mm | Flanged end | Up to 300 LPM |
