Additional information
| Brand | HR Wallingford |
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Water Level Float Gauge – 1200 mm
The water level float gauge uses a float which moves up and down a displacement transducer to measure slowly changing water levels, typically in flumes or 3D basins. The water level is determined by accurately measuring the distance from the head of the transducer to the magnetic field produced by a magnet mounted inside the float. The advantage of this method is that there is no contact, and therefore no friction, between the float and the transducer.
The transducer consists of a 10mm diameter stainless steel tube, which contains a stretched magnetostrictive wire. The tube is welded to a stainless steel head which contains all the electronics for the transducer.
Probe length
This product has a 300mm probe. 600, 900 and 1200mm probe lengths are available from this website. Other ranges are available on request.
Digital display unit option
The user can choose to purchase their water level float gauges equipped with a digital display unit, which shows pressure in a range of parameters.
Key features
- Excellent linearity
- Versatile display unit
- Easy to use
- Rugged design
- Non contacting
Transducer
- Range: 300, 600, 900 and 1200mm (other lengths available on request)
- Transducer diameter: 10.5mm
- Float diameter: 51mm
- Transducer and float material: Stainless steel grade 304
- Linearity: 0.05%
- Response time: less than 1ms
- Transducer supply: 24V DC
- Transducer output: 0-10V DC
- Cable length: 5m (other lengths available on request)
100% Original and qualityRelated products
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AccessoriesDigital Display Unit for Water Level Gauges and Transducers
The digital display unit is for use with individual gauges and transducers. It contains a digital panel meter, which has a 0-10V output and a serial RS 422/485 connection. A separate power supply unit allows the instrument to be used with either 110V AC or 220V AC supplies.
It is supplied with a case and 0 – 5V output.
Display
- 14mm high brightness LED
- Display supply: 24V DC (90-250V AC adaptor supplied)
- Display output – analogue: 0-10V, 0-20mA or 4-20mA
- Display output – serial comms: RS422/485
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Marine, Naval, Hydrodinamic and OceanographWavemaker for 2D Flumes
Flume wavemakers are normally driven by AC electric servo motors. Very large wavemakers are hydraulically powered.
Flume wavemakers are based on a wet-back design for simplicity and ease of maintenance. All flume wavemakers have active wave absorption fitted as standard.
Electrically powered wavemakers
Piston type wavemakers
For water depths up to 1.5 m the wavemaker is typically a piston type design where the paddle moves backwards and forwards horizontally. The advantage of this type of design is that the stroke is not generally limited, making the piston wavemaker ideal for producing solitary waves, absorbing reflected waves and compensating for long period set down phenomena. For deeper water applications, see our hinge flap type wavemakers below.
Depending upon the width of the flume, the paddle is mounted underneath either one or two electric drive actuators.These actuators are suspended from a structure that spans the flume walls. Alternatively the structure can be free-standing if required. With this arrangement all the bearings and precision components are situated well above the water level.
For more information on the actuators and how our wavemakers are powered and built, download the product brochure.
Hinge flap type wavemakers
This type of wavemaker is best suited to deeper water applications and is often used for ship towing tanks.
The wavemaker comprises a paddle that is hinged either on the bottom of the flume or on a raised supporting structure. The movement of the paddle is limited to approximately ±15 degrees to prevent wave distortion.
Again the design of this wavemaker ensures all of the drive actuation system is kept well above the water level with the use of a flexible belt and quadrant to drive the paddle. For wider flumes and towing tanks a dual actuator is used to achieve the required wave heights. The control system for the hinged flap wavemaker is the same as that for the piston type.Hydraulically powered wavemakers
Hydraulically powered wavemakers are usually of the piston type. The largest wavemaker supplied by HR Wallingford to date was hydraulically powered and was for a flume 5m deep and 3m wide.
Custom-built and quick installation with on-going support and training
Each wavemaker is custom-built to the client’s requirements and is equipped with HR Wallingford’s Active Wave Absorption System.
Installation is quick and straightforward with HR Wallingford providing commissioning, training and on-going support.
Key features
- Generates long-crested random waves using HR Merlin signal generation software
- Dynamic Wave Absorption guarantees precise control of wave conditions
- Wet-backed piston paddle provides long stroke
- Stainless steel and GRP construction delivers a design life in excess of 20 years
- Digital AC servo motor provides precise control and rapid response
- Easy to maintain with all bearings and precision components above water
- Hinged flap wavemakers are available for deep water and hydraulically powered wavemakers are available for very large flumes.
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