No products in the Quote.
Home Our Equipment Water Quality Monitors Turbidity
The ORAKEL Turbidity monitor automatically varies the light output so that the turbidity can be measured independently of background light and electronic drift. It is ISO 7027 compliant and covers a range of 0.01-1000 NTU (0.01-2000mg/l depending on the sample).
The ORAKEL System determines true turbidity and/or suspended solids in water, using a nephelometric measurement of scattered light in accordance with ISO 7027. The sensor uses lifetime-based optical technology to provide an extremely stable, accurate, low maintenance sensor with no moving parts and no consumables.
Each probe is equipped with a light source, a side detector for the measurement of scattered light from the sample and a reference detector for monitoring the light output. The light source is a long-life IR LED emitter.
This configuration allows accurate and reliable measurements of turbidity and suspended solids to be made.
Reliable calibration can be carried out using a single calibration with no need for a ‘zero’.
The probes are constructed of stainless steel and sapphire so can withstand demanding operating environments. An autoclean system can be included to keep the optical surfaces clean, thereby reducing maintenance to a potential ‘maintenance free’.
Calibration of the ORAKEL System really couldn’t be easier! Either take a reading of the water with another method and enter the value into the analyser or put the sensor into our black polyethylene calibration pot filled with 0.5 litre of standard (typically 20 NTU).
The analyser calibrates the sensor by a procedure that reduces the light output through four stages, taking measurements at each.
This process provides a very accurate and reliable zero and span without the requirement to use a ‘0’ NTU sample.
Anywhere where the measurement range is 0.01-1000 NTU (approximately 0-2000 mg/l, application dependent) is a suitable application for this sensor.
This includes traditional monitoring applications such as those listed here.
Range
Selectable within 0.01-1000 NTU, 0.01-2000 mg/l (application dependent).
Typical Ranges
0.01-20 NTU, 0.01-100 NTU, 0.01-1000 NTU.
Linearity
r2 > 0.99.
Response Times
T90 ≥ 10s (adjustable based on averaging).
Accuracy
< 1% of measured value or 0.01 NTU (whichever is greater).
Repeatability
< 0.3% of measured value or 0.005 NTU (whichever is the greater) (Ref: ISO 15839). Unit of Detection 0.01 NTU (0-10 NTU, Ref: ISO 15839). Temperature -20 to +85°C. Pressure 0-10 bar. Averaging 10 seconds – 10 minutes. Lamp Source IR LED, 860nm. Cleaning Cycles User settable cleaning cycle time and cleaning time. Cleaning Autoclean water jet. Enclosure Rating IP65. Sensor Environmental Protection IP68. Display Value, alarms and graphs at the same time. Resolution 0.001 NTU (0-10), 0.01 NTU (10-100), 0.1 NTU (>100).
Calibration
One point (zero not required).
Diameter
38mm (1.5 inch).
Length
278mm (11 inch).
The pH5 electrode has a double-junction reference to prevent contamination of the reference from sample components.
This design gives the electrode a longer life compared to ordinary electrodes (up to 3 yrs). The electrode also has a hemi-shaped glass measuring surface which is more durable than the traditional bulb-shaped glass.
Sitting at the top end of the market place, the ORAKEL pH probe has a longer life and lower maintenance requirements. Typically it only needs calibrating once every two or three months, making it a very cost effective solution.
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 Oxygen applications.
The ORAKEL System is a powerful, modular water quality monitoring solution designed to meet UK and international environmental standards. Equipped to measure key parameters like dissolved oxygen, temperature, pH, and turbidity, it offers real-time insights and compliance support for ecosystems and water bodies. Mains-powered with remote data communication options, the ORAKEL System is ideal for environmental monitoring in rivers, lakes, stormwater systems, and more.