SPS-NO3 Seba Nitrate Probe SPS-NO3 Seba Nitrate Probe SPS-NO3 Seba Nitrate Probe SPS-NO3
SPS-NO3 Seba Nitrate Probe SPS-NO3 Seba Nitrate Probe SPS-NO3 Seba Nitrate Probe SPS-NO3

Nitrate Probe SPS-NO3

Robust and virtually maintenance-free single-parameter sensor (SPS) for measuring nitrate ( NO3- , NO3-N)
Water | Water Quality Measurement | SEBA Hydrometrie

High accuracy, drift-free: Using a photodiode to take differentiated measurements of the incoming light at wavelengths of 212 nm, 254 nm, and 360 nm, the SPS-NO3 is able to determine the nitrate concentration with high precision and long-term stability. Organic compounds and turbidity are automatically compensated and therefore have little or no influence on the accuracy.

Optimized measuring ranges: Depending on the expected nitrate loads, the SPS-NO3 can be optimized for the use in groundwater and surface water by choosing the suitable path length. 4 path lengths with different measuring ranges of maximum 0-266 mg/L NO3- are available as standard.

Robust and slim design: The SPS-NO3 consists of a high-quality stainless steel housing (1.4571) and is ideally suitable for rough field use in groundwater and surface water. The nano-coating of the measuring window effectively prevents algae growth. The slim design allows installation in 3” observation wells.

Almost maintenance-free: In comparison to ion-selective nitrate electrodes, the calibration of the SPS-NO3 needs to be checked sporadically, saving time and money during ongoing measurement operations. An optionally available cleaning module with wiper additionally ensures that the measuring windows are free from unwanted fouling.

Modular and self-sufficient: Configure your field monitoring station from a wide range of SEBA data loggers (Unilog-Light, Unilog, UnilogCom, NetLogCom) in combination with other water quality probes (MPS-PTEC, MPS-D3, MPS-D8, MPS-K16) with or without remote data transmission, battery or solar-powered.

Nitrate Probe 

Methodology

Light source  Xenon-flashlight

Detector  4 photo diodes + filter
Measurement Principle Attenuation
Optical Path 1 mm, 2 mm, 5 mm
Parameter NO3-, NO3-N
Measurement Range

Path length: 1 mm:  0…266 mg/L NO3- ;

Path length: 2 mm:  0...133 mg/L NO3- ;

Path length: 5 mm:  0…53 mg/L NO3- ;

Further measurement ranges/path lengths on request
Measurement Accuracy

Path length: 1 mm: ±5 % + 4,4 mg/L NO3- ;

Path length: 2 mm: ±5 % + 2,2 mg/L NO3- ;

Path length: 5 mm: ±5 % + 0,88 mg/L NO3- ;
Turbidity Compensation Yes
Internal Data Logger Approx. 2GB
Reaction Time T100 20s
Measurement Interval ≥ 30 s
Maximum Pressure 0-3 bar
Housing Stainless steel (1. 4571/1.4404) or Titanium 3.7035
Dimensions approx. 470 x 48 mm (10 mm pathway)
Weight Approx. 3kg
Interface Digital Ethernet (TCP/IP), RS-485 (Modbus RTU)
Power Consumption less or equal to  8 W
Power Supply 12...24 VDC (± 10 %)
Calibration / Maintenance Interval 24 month
Maximum Pressure With cable 0 - 3 bar
Protection Class IP68
Accessories

Cleaning module with Anti Fouling Wiper

Wiper blades for cleaning module