The Testomat 2000® PO4 from Heyl reliably and continuously monitors the orthophosphate content in the range from 0 to 10.0 mg/l (ppm). The analysis method is based on the molybdate blue method. This involves a chemical reaction that produces a characteristic steel blue color change in the sample. The color intensity is evaluated photometrically. The Testomat thus automatically delivers accurate, stable measurements – ideal for the continuous monitoring of process and service water, e.g., in the feed water of a steam boiler or the precipitation tank of a sewage treatment plant. Performance profile: Analysis by automatic addition of 2 reagents Measurement result display after a reaction time of approx. 10 minutes (measurement time without rinsing time) Menu-guided operation and programming via plain text display Selection of units in ppm or mg/l Analysis trigger: o Automatic interval operation (interval pause adjustable from 0-255 minutes) o External control o Quantity-dependent via contact water meter Two independent limit values with hysteresis (1, 2, or 3 poor analyses) and adjustable switching functions Monitoring of two measuring points (switching via external solenoid valves) Internal error documentation Programmable service address Programmable maintenance interval for maintenance requests