LMS water

The 803PS Water Quality Sonde

The 803PS Sonde is an immersible multi-electrodes measuring platform, which can accommodate up to eight different electrodes simultaneously. It fits easily into a 4-inch (100 mm) borehole and can be used to monitor water quality at depths up to 100 meters.

{The 803PS Sonde}
803PS Sonde Electrodes

The following electrodes are designed specifically to fit the 803PS Sonde
Temperature sensor -5 °C to +50 °C which is a standard fitting.

830PH ...pH level 0 to 14 combination electrode.

834PH ...Redox/ORP, range ±800mV

840US ...Conductivity 0.5µS/cm to 100mS/cm. Salinity/TDS 0 to 60ppt

850OX ...Dissolved Oxygen 0 to 20ppm, 0 to 200% saturation

810TU ....Turbidity/TSS 0.2 NTU to 4000NTU

803PD ....Depth measurements 0 to 100 meter

860IS .....Ammonium ISE (Contact LMS water for ISE sensors)

Up to eight different chemistry electrodes for measuring water quality can be fitted at one time.
The 803PS Sonde contains its own microprocessor and control electronics, so the cable from the Sonde to the WP4007 (data logger) supplies only the power and digital interface between the instrument and the Sonde.
The Sonde can withstand 300ft (100m) water depth, and can be used to measure estuaries, lakes, rivers and effluent.


Range/ Resolution 0.00 to 14.00 pH ± 800mV (abs)
Accuracy (25°C) ± 0.05 pH 0.1 mV or 0.05 % rdg
Response Time (98%) 15 seconds
Range/ Resolution ± 800mV
Accuracy (25°C) ± 0.2mV
Response Time (98%) 10 seconds
Conductivity/ Salinity/ TDS
Low High
Range/ Resolution 1.0 to 2000.00 µS/cm 1.0 to 100.0 mS/cm
Accuracy ± 2%rdg ± 1.0 ± 3%rdg ± 0.1
Response Time (98%) 15 seconds 15 Seconds
Salinity/ TDS
Range/ Resolution 0.00 to 60.00 ppt
Accuracy (25°C) 1.50ppt
Response Time (98%) 15 seconds
Dissolved Oxygen
Range/ Resolution 0.00 to 20.00ppm (mg/l)
0.0% to 200.0% Saturation
Accuracy ±0.2ppm (mg/l)

Response Time (98%) 2 minuets
Low High
Range/ Resolution 0.3 to 100.0 NTU 50 to 4000 NTU
Accuracy ±5%rdg ±1 NTU ±5%rdg ±10NTU
Response Time (98%) 8 seconds 8 Seconds
Range/ Resolution 1.3 to 250.0 mg/l (silica) 125 to 10,000 mg/l (silica)
Accuracy ±5%rdg ±2.5mg/l ±5%rdg ±25mg/l
Response Time (98%) 8 seconds 8 Seconds
Range/ Resolution 0.1 to 200.0 ppm
Accuracy ±10%rdg ±0.2ppm (<1ppm)
±10%rdg ±1ppm (>1ppm)
Response Time (98%) 3 minuets
Ion Selective Electrodes (ISE)
Range/ Resolution 0.01 to 200.00ppm
0.01 to 200.00ppt

±2% rdg
depends on ISE

±2% rdg
depends on ISE
Response Time (98%) Depends on ISE type
Sensor type Platinum Pt100 (Din 43760)
Range/ Resolution 0.0 to 50 °C
Accuracy ± 0.25 °C
Response Time (98%) 10 seconds
Electrode type Micromachined silicon
Range/ Resolution 0.00 to 100.00 m
Accuracy ± 0.5 m

Power requirement 30mA (without stirrer)
70mA (Stirrer on pulse mode)
100mA (Stirrer continously on)
Case Acetal, Erthalyte and stainless steel 316, IP68

Dimensions 90mm diameter x 315mm length

Weight 1.85Kg