PHOSPHAX Sigma total phosphorus / orthophosphate analyzer

Measuring principle:

• The Phosphax Sigma total phosphorus/orthophosphate analyzer is based on the molybdenum blue method. Polyphosphates and phosphorus-containing compounds are hydrolyzed under high-temperature, high-pressure acidic conditions to form orthophosphate, and sodium persulfate further oxidizes other stable phosphorus-containing compounds to orthophosphate. In a strongly acidic solution containing molybdate, the orthophosphate ions form an antimony compound that is reduced by ascorbic acid to blue phosphomolybdenum blue. The total phosphorus/orthophosphate analyzer measures the absorbance of the phosphomolybdenum blue to complete the determination of total phosphorus in the sample.

• Water samples containing suspended solids must be treated by the SIGMATAXTM 2 sample pretreatment system before entering the total phosphorus/orthophosphate analyzer. The system uses a new vacuum negative-pressure sample collection and transfer technology and advanced ultrasonic crushing technology to crush all suspended solids and introduce them into the total phosphorus/orthophosphate analyzer for measurement, thereby accurately analyzing all phosphorus in the water sample.

Industries of application:

The Phosphax Sigma total phosphorus/orthophosphate analyzer can provide automatic determination and content analysis monitoring of total phosphorus in surface water, domestic wastewater, and industrial wastewater; continuous automatic monitoring of total phosphorus/orthophosphate/organic phosphorus in industrial circulating water, and control the automatic addition of corrosion and scale inhibitors.

Instrument features:

• The total phosphorus/orthophosphate analyzer can automatically analyze total phosphorus and orthophosphate, and directly display the concentration of phosphorus-containing corrosion and scale inhibitors.

• The total phosphorus/orthophosphate analyzer uses the molybdenum blue method in accordance with the standard method (DIN38 405 D11), with a low detection limit and fast response speed. The determination of total phosphorus takes only about 10 minutes.

• The Phosphax Sigm total phosphorus/orthophosphate analyzer is equipped with the SIGATAX2 sample pretreatment system, suitable for the determination of total phosphorus in water samples containing suspended solids.

• It has an automatic calibration function with high accuracy.

• It has an automatic cleaning function with low maintenance.

• The total phosphorus/orthophosphate analyzer is equipped with a safety protection panel to effectively protect the safety of operators.

• The total phosphorus measurement results can be displayed graphically or numerically.

Technical specifications

• Measuring range:    Total phosphorus:    0.01-5.0mg/L (as phosphorus)

• Total phosphorus:    0.01-10mg/L (high range)

• Orthophosphate:    0.01-5.0mg/L

• Measuring accuracy:    ± 2%

• Measuring cycle:    approx. 10 minutes

• Instrument calibration:    Automatic

• Sample flow rate:    100mL/h

• Reagent replacement cycle:    3 months

• Signal output:    2-channel 4 - 20mA analog output; maximum load 500 ohms; RS232 optional

• Communication protocol:    Modbus and Profibus optional

• Operating temperature:    5 - 40℃

• Power supply requirements:    220Vac/50Hz

Related reagents

Spare parts

Ordering guide

• LPV341.80.20000    Low-range total phosphorus online analyzer, 0-5mg/L

• LPV341.80.20010    Low-range total phosphorus online analyzer, 0-5mg/L, with Modbus

• LPV341.80.20020    Low-range total phosphorus online analyzer, 0-5mg/L, with Profibus

• LPV341.80.30000    Low-range total phosphorus/orthophosphate online analyzer (dedicated for circulating cooling water), 0-5mg/L

• LPV341.80.30010    Low-range total phosphorus/orthophosphate online analyzer (dedicated for circulating cooling water), 0-5mg/L, with Modbus

• LPV341.80.30020    Low-range total phosphorus/orthophosphate online analyzer (dedicated for circulating cooling water), 0-5mg/L, with Profibus

• LPV341.80.11000    High-range total phosphorus/orthophosphate online analyzer, 0-10mg/L

• LPV341.80.11010    High-range total phosphorus/orthophosphate online analyzer, 0-10mg/L, with Modbus LPV341.80.21000   High-range total phosphorus online analyzer, 0-10mg/L

• LPV341.80.21010    High-range total phosphorus online analyzer, 0-10mg/L, with Modbus

Reagents and consumables

• LCW823    Total phosphorus reagent kit, one set

• LCW824    Phosphorus standard solution, 2mg/L

• LZP959    Wearing parts kit, (for 0-5mg/L)

• LZV809    Wearing parts kit, (for 0-10mg/L)

Other options

• A complete SIGMATAX 2 sample pretreatment system consists of a controller, sample pretreater, and installation accessories

• LXV215 SIGMATAX 2    Sample pretreater controller

• LXV231 SIGMATAX 2    10 m sample treatment tube

• LXV232 SIGMATAX 2    20 m sample treatment tube

• LXV282 SIGMATAX 2    30 m sample treatment tube

• LZX414.00.00000 SIGMATAX 2    Sample pretreater installation accessories

Source: Public information from the HACH Water Quality website