Water Quality Sensors

Analite 390 Series SDI-12 Turbidity & Temperature Probe Specifications

Specifications

Technique: 90° Infra-Red (ISO7027).
Range: 40, 100, 400 and 1,000 NTU - user set.
Resolution Digital: 40NTU ±0.01NTU 100NTU ±0.02NTU 400NTU ±0.1NTU 1,000NTU ±0.2NTU
Resolution Analogue: 40NTU ±0.06NTU 100NTU ±0.15NTU 400NTU ±0.6NTU 1,000NTU ±1.5NTU
Repeatability: ±1% at 25°C.
Linearity: <1% for 40NTU, 100NTU and 400NTU, 3% for 1,000NTU. (using 3 point cal)
Output: RS232 1200 Baud 7 data even parity 1 stop
SDI-12 Protocol: V1.3
0-1V dc or 0 –2.5 vdc (minimum load 3K0 391 – 396)
4-20mA 0r 0 – 20mA (maximum load 350 ohms 391 – 396)
Measurements:
Latest turbidity measurement -1 sample.
Mean and Sample Variance (over 100 samples)
Median (over 100 samples)
Minimum (over 100 samples)
Maximum (over 100 samples)
Calibration: 2 or 3 point calibration for each range may be set by the user only through the RS232 interface.
Power: 9.6 - 16V dc, 1.5mA OFF, 35mA ON. 60mA ON and wiping
Wipe Time: 6 seconds nominal.
Weight: NEP390S Stainless 500gms, NEP395S Stainless 550gms,
NEP390P Plastic 300gms, NEP395P Plastic 350gms
Cable Weight: 70g/m. Cable length to order - 60m max.
Depth Rating: 50m (plastic) 100m (Stainless).
Operating Temp: -10°C to 40°C.
Storage Temp:. -20°C to 50°C.