The ANALITE NEP-9500 series of analogue output turbidity probes are designed for monitoring and process applications where turbidity levels of up to 3,000 NTU may be encountered. Standard ranges are 100 NTU, 400 NTU, 1,000 NTU, and 3,000 NTU and custom ranges are available. Digital outputs (SDI-12 and/or RS232) are also available in other versions of ANALITE turbidity probes.
The ANALITE NEP-9500 probes use 90° optics and employs infrared light in accordance with ISO7027. All probes use a unique modulation technique that ensures almost total rejection of ambient light conditions as well as a unique microprocessor that controls differential sample and hold the circuit for enhanced performance, particularly at low turbidity levels.
- Monitoring of streams and rivers
- Monitoring of water storage bodies, including stratification studies
- Intermediate and final effluent treatment monitoring
- Hydrological run off studies
- Ground and bore water analysis
- Drinking water filtration efficiency
- Industrial process monitoring
- Sludge and dredge monitoring
| Technique | 90° modulated infra-red (ISO 7027) |
| Ranges | 100, 400, 1,000NTU and 3,000NTU |
| Resolution |
100NTU ±0.2NTU NEP9x01 400NTU ±1.0NTU NEP9x04 1,000NTU ±3.0NTU NEP9x10 3,000NTU ±10NTU NEP9x30 |
| Repeatability |
±1% at 25°C for 100NTU and 400NTU ±2% at 25°C for 1,000NTU |
| Outputs |
±2.5V over Range 4-20mA and 0 to +2.5V ranges also available to order |
| Zero Offset | Less than ±3mV (0 to 40°C, ±2.5V output) |
| Calibration | Factory calibrated using non-toxic AEPA polymer solutions |
| Power | 9.6-28VDC, 15mA on 40mA when wiping for NEP-9500 models only |
| Wiping | For NEP-9500 models only. Initiated by momentarily (>50ms and <500ms) bringing the wiper actuation conductor to the 0V conductor. By permanently terminating the wiper actuation conductor to 0V will initiate a wipe every 2 hours on power-up. During a wipe, the output remains within ±1% full scale of the turbidity value just prior to the wipe. |
