PI TurbSense® online turbidity meter is a breakthrough in measurement technologies in that it automatically varies the light output so that the turbidity can be measured independently of background light and electronic drift.
Calibration of the TurbSense® is simple and fast. Due to the patented method of mesuring turbidity calibration is only required every year or when a calibration check suggests that the calibration has changed. There are three ways to calibrate the TurbSense®.
The first is to place the sensor probe into a primary calibration standard inside the calibration chaber supplied. This primary calibration solution is likelyto be a solution of Formazin or a suspension of Latex beads of known turbidity.
The second is by using a Secondary Standard from Pi. This is a solid that when placed against the end of the TurbSense® will give a response of a known turbidity (this secondary standard can be used to calibrate the turbidity sensor and also to provide a check of the calibration already in the probe).
The third way to calibrate a turbidity meter is to measure the turbidity of the sample using a handheld turbidity meter and using that result to calibrate the TurbSense®.
Features
- Autoclean solid state optical sensor – no moving parts
- Single point calibration – very easy to use
- Stable and reliable – excellent process control
- Suitable for all potable, waste and process waters between 0 NTU and 1000 NTU
- ‘Maintenance free’– low cost of ownership
- No ‘zero’ required – improved accuracy at the low end
- Up to 1 year between calibration – very little drift
- Up to 10 bar – for inline operation
- 0.001 resolution
- Automatic debubbling and bubble removal solutions – no interference from bubbles
Applications
- Raw water inlet
- Settled water turbidity
- Final water turbidity
- Waste water effluent turbidity
- Fire hydrant monitoring
- Swimming pool clarity monitoring
Technical Specifications
| Range | Selectable within 0.01 ~ 1000 NTU |
| Typical Ranges | 0.01 ~ 20 NTU 0.01 ~ 100 NTU 0.01 ~ 1000 NTU |
| Linearity | r2 > 0.99 |
| Response Time | T90 >= 10 secs (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 greater – Ref: ISO 15839) |
| Unit of Detection | 0.01 NTU (0 – 10 NTU: Ref: ISO 15839) |
| Temperature | -20 to 85 deg C |
| Pressure | 0 – 10 Bars |
| Averaging | 10s – 10 mins |
| Lamp Source | IR LED, 820nm |
| Cleaning Cycles | User Settable Cleaning Cycle and Cleaning Time |
| Cleaning | Autoclean Water Jet |
| Enclosure Rating | IP65 |
| Sensor Environmental Protection | IP68 |
| Display | Value, Alarms and Graph at the same time |
| Resolution | 0.001 NTU (0-10), 0.01 NTU (10-100) and 0.1 NTU (>100) |
| Calibration | Single Point (Zero Not Required) |
| Sensor Dimension | 278mm x 38mm (L x Dia) |
Accessories for TurbSense Sensor
