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CHEMITEC
42 series - Process Analysers

42 series - Process Analysers

Product catalog summary

Overview: The Chemitec 42 series is designed for water treatment and industrial applications, offering measurement capabilities for parameters such as pH/REDOX, dissolved oxygen, conductivity, turbidity, suspended solids, chlorine, chlorine dioxide, and ozone. It is available in wall-mounted and panel-mounted versions with IP66 protection.

Display and Data Recording: The device features numerical and bar graph measurements, temperature values, and status indicators. It includes a 4-bit internal flash memory for storing approximately 16,000 records with a recording interval of 1 to 99 minutes. Data can be viewed in table or graphic form, showing maximum, minimum, and average values.

PID Control: The 42 series supports P, PI, and PID functions on analogue or digital outputs, with programmable proportional range, integral time, and derivative time. It includes two analogue outputs and four digital outputs, with programmable limits and set points.

Process Control Device: The device supports various inputs and outputs, including RS485 serial port, USB, and current outputs. It features programmable alarms and washing cycles for electrodes, with digital inputs to disable dosing.

Measurement Capabilities: The series supports a wide range of measurements, including pH/REDOX with replaceable electrodes, conductivity with various probe materials, dissolved oxygen using optical technology, and chlorine with amperometric sensors. Each measurement type is designed for specific industrial applications, with options for dual parameter versions.

Technical Specifications: Detailed specifications for each sensor type include measuring range, temperature, pressure, and material compatibility. Temperature compensation and maintenance-free designs are highlighted for reliable operation in industrial environments.

Applications: The 42 series is suitable for applications such as water treatment plants, industrial water monitoring, aquaculture, and biological purification systems. The sensors are designed for low maintenance and high accuracy, with digital interfaces for real-time data communication.

Specifications:

Reproducibility: ±2% of the value read.
Stability: ±1% of the analytical determination 4 weeks after calibration.
Working Conditions: Sample speed on membrane: 15 cm/sec; Hydraulic feed flow: 30-40 l/h, constant; Acceptable overpressure: 1 bar; Operating temperature: > 0 to 45 °C; Temperature compensation: Automatic via built-in NTC sensor.
Time: First polarization: 1 hour; Re-polarization: 10 minutes; Response: T90: approx. 30 seconds.
Point Calibration: Zero not necessary; work as needed by the user through analytical determination (colorimetric with DPD).
Materials: Sensor body: PVC, silicone, PTFE; Membrane: Semi-permeable PTFE (Teflon); Electrolyte solution: Aqueous containing potassium chloride; Measuring electrode: Gold (cathode); Reference electrode: Silver/halogenated silver (anode).
Dimensions: Diameter approx. 25 mm / Length approx. 175 mm.
Warnings: Check electrolyte status every 3 to 6 months; electrolyte solution lifespan approx. 1 year.

Measurement and Control:

Parameter Measuring Range and Operating pH Range: Free chlorine: 0.01 to 200 ppm, pH 5.5 to 7.2; Total chlorine: 0.01 to 10 ppm, pH 4 to 12; Free organic and inorganic chlorine: 0.01 to 10 ppm, pH 4 to 9.5; Chlorine dioxide: 0.01 to 10 ppm, pH 2 to 11; Ozone: 0.01 to 10 ppm, pH 2 to 11; Peracetic acid: 0 to 20000 ppm, pH 2 to 11; Hydrogen peroxide: 1 to 100000 ppm, pH 2 to 11; Chlorites: 0.02 to 2 ppm, pH 6.5 to 9.5.

Flow-through Electrode Holder:

Materials: Plexiglas cell, PVC fittings and valves, stainless steel float, NBR O-ring.
Working Conditions: Max operating temperature 60 °C, max operating pressure 4 bar.

Turbidity Measurement:

Applications: Measuring turbidity in primary water, waste water, and industrial water.
Characteristics: Reliable optical measurement, 90° scattering method compliant with ISO 7027 / EN 27027, built-in debubbler device, fast calibration.
Technical Data: Measuring ranges: 0 to 1000 NTU; Precision: ±3% of full scale; Repeatability: 95%; Response time: 2 minutes for 90% of full scale; Calibration: By known point; Materials: PVC, max pressure 2 bar, flow rate 60-300 l/h, sample temperature 0-50 °C.

S462 Turbidimetric Cells:

Applications: Water treatment plants, waste water refining, food industry, swimming pools.
Characteristics: Dual sensor system, high precision and repeatability, stable over time, minimal re-calibrations.
Technical Data: Max pressure 6 bar, max temperature 90°C, stainless steel body, PTFE lining, tempered glass inspection window.

S461 Submersible Turbidity/SS Probes:

Applications: Measuring turbidity and sludge concentration in water treatment plants.
Characteristics: Optical infrared technology, 90° scattering method, stainless steel body, high sensitivity.
Technical Data: Measuring range up to 4000 NTU, accuracy ±3% of full scale, repeatability 98%, max pressure 4 bar, protection rating IP68.

7520 SAV-T/E and 7540 SRH-T/E Probes:

Applications: Measuring high concentrations of suspended solids in water treatment and extraction systems.
Characteristics: Infrared optical measurements, dual pulsed light beam system, stainless steel body, digitized signal.
Technical Data: Measuring range 0-150 g/l, accuracy ±1% of full scale, repeatability 99.5%, max pressure 6 bar, protection rating IP68.

Catalog excerpts

water treatment and industry Wall-mounted version with IP66 protection Panel-mounted version Process control device ► Simultaneous measurement (numerical and bar graph) and temperature values. ► Scrolling output values. ► Graphic icons for: status of digital outputs, washing cycle, data recording, alarms. ► Possibility to display the measurement only in large format. Data recording ► 4-bit internal flash memory (about 16,000 records). ► Type: Circular (F.I.F.O.) or filling. ► Ability to view the logged data in table or graphic form, with indication of the maximum, minimum and average values in ► P - PI - PID functions activated on the analogue or digital ► Output 1 programmable for measurement. ► Output 2 programmable for measurement / temperature / ► The limits of the outputs are freely programmable within the measuring range. ► ON/OFF set point: Programming the operating range (hysteresis/direction) and start/stop time 000 to 999 seconds. ► PID control: Pulses, frequency or PWM (2 set points).

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4Programmable for: tool faults, minimum, maximum, set point delay, stay time (live check). 4For set-up and remote real time acquisition or for downloading data (using dedicated software). 4Delay time: 00:00 to 59:59 mm:ss with minimum interval of 15 sec. 4 MODBUS RTU communication protocol. 4Set point deactivation (in case of alarm): Enabling/Disabling. 4USB for direct download on PEN DRIVE (optional). Washing electrodes Manual controls 4Programming the interval (minimum 15 min) and the duration. 4Possibility to simulate the analogue and digital outputs from the keypad. 4During washing, all the...

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Simple and intuitive software GRAPHIC DISPLAY All basic paiameleis far operallon logres are set CALIBRATIONS MENU Calibration Pioc edtire of the elecliode DIGITAL AND ANALOGUE OUTPUTS MENU Selling of digital and analogical outputs ARCHIVE MENU Selling of the data aichive and visuallzatio n mode GRAPHICAL MEASUREMENT MENU Visualization of archives in a graphical fofm MANUAL CONTROL MENU Manual control and acllvafion of Entries and Outpuls ► Main menu with graphic icons Display of stored data in graphical form, even during RUN TIME ► Interactive, easy to read interface MODBUS RTU serial interface...

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Dimensioni Wall-mounted version with IP66 protection rating 122,5 144

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Measuring range pH 0 to 14 pH Resolution 0,01 pH Dual parameter versions available 4238-38 [pH/REDOX - pH/REDOX] 4238-22 [pH/REDOX - Conductivity] 4238-23 [pH/REDOX - Inductive cond.] 4238-83 [pH/REDOX - Dissolved oxygen] 4238-63 [pH/REDOX - Turbidity/SS] pH and REDOX electrodes The electrodes shown below are all of the combined type (Measuring + Reference), do not require maintenance and differ in their structural characteristics, making them suitable for many applications. The elements that must be considered when choosing an electrode are: measuring range, temperature, pressure and chemical...

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Sonde pH e REDOX con uscita RS485 4pH or REDOX measurement using measuring technique for demanding or prohibitive applications 4Replaceable measuring and reference electrodes 4Built-in temperature with PT100 4Galvanically-isolated RS485 output S401DIFF digital pH probe Measuring range Protection rating Power supply Length of cable (included) S406DIFF digital Redox probe Measuring range Temperature Characteristics Protection rating Power supply Length of cable (included)

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Measuring range Conductivity 0 to 20 μS; 0 to 200 μS; 0 to 2,000 μS; 0 to 20,000 μS; 0 to 200,000 μS Resolution 0.01 μS; 0.1 μS; 1 μS; 10 μS Dual parameter versions available 4238-22 [pH/REDOX - Conductivity] 4293-22 [Chlorine - Conductivity] S411-S428 Conductivity probes Specially designed for use in an industrial environment, these make it possible to cover a very wide measuring range, thanks to versions with temperature sensor, special versions with PVC, PTFE, PVDF body, graphite, steel or platinum electrodes. Conductivity is measured by submerging the two metal electrodes of the probe in...

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Inductive conductivity Measuring range Conductivity 0 to 1,000 μS; 0 to 10,000 μS; 0 to 100,000 μS; 0 to 1 Simens (0 to 999.999 mS) Resolution 1 μS; 10 μS; 100 μS; 1,000 μS Dual parameter versions available 4238-23 [pH/REDOX - Inductive cond.] 4293-23 [Chlorine - Inductive cond.] S411/IND Inductive conductivity sensors 4Low maintenance 4Versions for in-line, submersion or tank installation 4Ideal for cooling towers, process water, concentrated solutions The S410/IND series of inductive sensors has been engineered and developed to produce an electrode that is very powerful but at the same time...

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Dissolved Oxygen Measuring range Dissolved oxygen 0 to 20.0 ppm or mg/l - 0 to 200% SAT Resolution 0.1 ppm or mg/l - 1% SAT Dual parameter versions available 4238-83 [pH/REDOX - Dissolved oxygen] 4262-83 [Turbidity - Dissolved oxygen] 4263-83 [Suspended solids - Dissolved oxygen] 4283-83 [Dissolved oxygen - Dissolved oxygen] with S423/C/OPT optical sensor only S423/OXYSENS™ Main measuring range The oxygen contained in the liquids is measured using the so-called Clark cell system. These cells generate a current proportional to the partial pressure of the oxygen, which can be detected using a suitable...

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4Optical technology: no membrane or electrolyte 4No signal drift: no calibration 4Digital output: Modbus RS-485 4Sturdy stainless steel structure Fields of application • Biological purification systems (aeration, nitrification/denitrification tanks etc.) • Industrial water treatment plants • Monitoring surface water • Aquaculture • Water conditioning Optical technology The S432/C/OPT sensor measures oxygen with a built-in temperature probe. The measuring technique is based on the optical principle: a diode emits a light blue towards a support on which a fluorescent substrate is applied. The substrate...

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Chlorine and other oxidants Measuring range from 0 to 100,000 ppm to be selected in relation to the type of sensor connected Dual parameter versions available 4238-93 [pH/REDOX - Chlorine] 4262-93 [Turbidity - Chlorine] 4293-22 [Chlorine - Conductivity] 4293-23 [Chlorine - Inductive cond.] 4293-93 [Chlorine - Chlorine] chosen from Free, Total, Dioxide, Ozone, PAA, H2O2 S 494 Amperometric sensors with membrane Amperometric sensors with 2 or 3 membrane-covered electrodes with built-in temperature sensor for signal compensation. Assembly in a flow-through cell with constant flow (S305PX). Technical...

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