1. Entry of the sample: The sample enters the measuring cell for washing and priming.
2. First measurement (Photometric Zero): An initial measurement is taken of the sample as is.
3. Reagent addition: Reagent is added using the peristaltic pump.
4. Reaction development: The reaction develops through stirring.
5. Colour reading (Absorbance): The colour (absorbance) is read. The differential measurement between the Zero and the Absorbance is processed by the electronic processor and converted into a concentration value, using specific correlation tables developed in our laboratories.
6. Result display and dosing control: The electronic controller displays the measured substance in mg/L and indicates whether or not to activate the dosing components designed to control or correct it.
7. Automatic calibration: The system calibration is performed automatically at each measuring cycle.

• Programming keypad with 4 bubble-keys.
• STN 240x128 backlit graphic LCD to display:
  • Measurements (simultaneous measurement and temperature parameter + trend line).
  • Digital output status.
  • Storage status.
  • Faults.
  • Photometric measurement phase.

• Data logger of Circular (F.I.F.O.) or Filling type, on an internal 4 Mbit flash memory, equal to 16000 records, with a recording interval from 1 to 99 min.
• RS485 serial output for set-up and Chemitec 4001 Series Real Time status from remote or to download stored data on a PC or laptop (using dedicated software), via MODBUS RTU communication protocol.
• Digital input for disabling dosages.

• Analysis of drinking and wastewater.
• Analysis of food products.
• Pharmaceuticals.
• Chemicals.

Automatic calibration ensures that the 4001 Series maintains accuracy and reliability in measurements. This feature minimises user intervention and reduces the risk of human error, making it ideal for consistent liquid analysis across various applications.

The 4001 Series is particularly beneficial in pharmaceutical applications, where precise liquid analysis is critical for quality control and compliance with regulatory standards. Its ability to analyse various liquid samples ensures that pharmaceutical products meet safety and efficacy requirements.