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Our Equipment Water Quality Monitors Suspended Solids
The ORAKEL Suspended Solids senor has a large dynamic range, which eliminates the need for a “zero” and also eliminates the effect of background light.
For multiple measuring ranges, the suspended solids sensor can monitor turbidity and suspended solids from 2 NTU (1mg/l) to 8%* solids.
The ORAKEL Suspended Solids senor has a large dynamic range, which eliminates the need for a “zero” and also eliminates the effect of background light. For multiple measuring ranges, the suspended solids sensor can monitor turbidity and suspended solids from 2 NTU (1mg/l) to 8%* solids.
The sensor uses lifetime optical technology to provide a stable, reliable low-maintenance sensor with no moving parts and no consumables. It determines the suspended solids concentration, or turbidity in the water using a measurement of the back scattered light.
Each sensor is fitted with an infra-red LED emitter light source and two matched photodiodes detectors for making the measurements. It has two detectors, positioned at different distances from the light source. This allows the sensor to be used over a wide range of suspended solids concentrations.
The detectors are positioned to detect back scattered light (light that is scattered by
The sensor can be mounted on the end of a pole for dip mounting in the channel or tank, or inserted into a pipe via a valve which allows for retraction and removal of the sensor without shutting down the process.
The sensor is fitted with a cleaning nozzle to keep it clean. This can be used to clean the optical windows with a jet of water. The procedure can be programmed to be automated at predefined intervals.
Calibration for turbidity measurements or measurements of samples with low concentrations of solids is very easy only requiring a single calibration sample. This sample can either be a reading from another method or a suitable standard.
The ORAKEL control unit calibrates the sensor by reducing the light output through four stages, taking measurements at each. This process provides an accurate and reliable zero and span without the requirement to use a ‘0’ NTU/solids sample.
Calibration of the sensor for measurement of samples with high concentration of solids uses a multipoint procedure. Up to 5 calibration points can be used to give accurate performance across a wide range of sample concentrations.
Up to 500g/l, 4000 NTU (depending on the optical properties of the sample)Units:
Selectable g/l, mg/l, ppm, ppt or % (suspended solids) NTU or FNU (turbidity)
<2% of measured value or 0.01g/l or 0.8 NTU (whichever is greater)
<1% of measured value or 0.001g/l or 0.8 NTU (whichever is greater)
Limit of detection:
0.001g/l or 2.4 NTU
Up to 0.0001g/l or NTU
T90 ≥ 10sec (adjustable based on averaging)
IR LED (860nm)
Approximately 1kg (35oz)
10 bar (145psi) [maximum]
Mounting thread (for dip installation):
Max. power consumption:
70mA at 12 VDC
6m (20ft) as standard. (Talk to us if you need a longer length)
316 Stainless steel, sapphire
*8% in typical municipal waste water slurries. This value will vary depending on the optical properties of the sample.
Optical luminescent devices which are extremely resistant to abrasion, extremely stable, and have greatly reduced maintenance and whole life costs.
The ORAKEL Dissolved Oxygen sensor has no chemicals or moving parts. It is stable and reliable making it excellent for process controls and is suitable for all Dissolved Ovygen applications.
The ORAKEL peracetic acid sensor is a membrane device which use no reagents. It is extremely stable and has a reduced maintenance and reduced whole life costs.
With its reduced maintenance, reduced calibration and reduced spares requirements, the ORAKEL peracetic acid sensor is arguably the most cost effective peracetic acid analyser available.
Water can have a positive or negative Oxidation Reduction Potential (ORP) and it is measured in volts. ORP is a way to measure water’s ability to accept or release electrons during a chemical reaction. Understanding the ORP value helps determine the quality of the water and thereby helps operators decide what water treatment processes may be required. The more positive the ORP value, the greater the tendency the water has to oxidise (gain electrons from) organisms or other material in the water, thereby killing or destroying them.
The ORAKEL COD/TOC Sensor uses UV254 light as a surrogate measurement for detecting organics in water.
It is designed in modular form so that it can be integrated with other sensors, such as pH, turbidity and dissolved oxygen, to provide all the tools needed for either a stand-alone UV254 analyser or as part of an effluent discharge monitoring system.
The ORAKEL COD/TOC Sensor provides online continuous organics monitoring utilising a 254nm ultraviolet light source.
Particle counters are known for their ability to detect when a filter is reaching the end of its life. ORAKEL Particle Counters are sophisticated instruments suitable for municipal and industrial water treatment applications including filter performance monitoring, protecting RO membranes from colloidal fouling and corrosion product monitoring.
The ORAKEL range of Conductivity meters also double as a Salinity meter and a TDS meter. The range measures conductivity in water from 0 to 2,000,000 µS/cm (range selectable). You can choose between a standard graphite sensor and a more sophisticated toroidal sensor, or stainless steel ‘special’ sensors for high temperature, high pressure conductivity measurement applications.