IQ SENSOR NET CONTROLLER
Multi-Parameter Terminal/Controller MIQ/TC 2020 3G




Digital and modular network system for wastewater treatment plant monitoring to connect up to 20 sensors. The heart of every IQ SENSOR NET system 2020 – multi-parameter system for up to 20 sensors with USB interface, remote maintenance and remote communication:
- Access from remote by integrated webserver IQ WEB CONNECT
- A solution for every application – up to 20 sensors can be connected, all IQ parameters are measurable
- Flexible and ready for the future – the IQ SENSOR NET can be expanded as needed thanks to ist modular design. The high-performance processor of the terminal/controller MIQ/TC 2020 3G coordinates all tasks inside the network. The USB interface allows quick data exchange via USB stick or directly to external systems. The system status LED provides reliable and quick information about the function and the system status.
The system stores the measured values of a new connected sensor and all configuration data automatically. The large, colored display and the large buttons ensure a clear and customer friendly operation at any conditions.
When integrating two MIQ/TC 2020 3G into system, the system security and therefore the availability of the total system is ensuredby the controller-redundancy-function. This lets you use one MIQ/TC 2020 3G as a terminal and a controller (fixed installation), and a second one as a mobile terminal. By including this into the network, you can have remote communcation as well as remote maintenance.
For the remote maintenance from a PC, you need to install the software IQ Software Pack CONNECT. This setting can be made via a user interface according to the MIQ/TC 2020 3G terminal. In addition, you have the option to transfer measuring and configuration data of the system to a computer. For the control with the IQ Web Connect the MIQ/MC3 is required.
The MIQ/TC 2020 3G Terminal/Controller is aavailable as different versions. As single Terminal or as pre-configured, ready-to-used starter sets with special prices. Each of these 3 sets consists of a Terminal/Controller (MIQ/TC 2020 3G), a power supply module (MIQ/PS) and an output module with 1) 3 current outputs and 3 relays or 2) 6 relays or 3) an ethernet interface. The latter provides the digital fieldbusses Ethernet/IP, Modbus TCP and PROFINET.
MIQ Module Coupling at Rear | Combined mechanical and electrical connection, for rapid coupling to MIQ modules |
USB interface | USB-A (host) |
Display | Graphic display; resolution: 320 x 240 pixel; visible area: 4.49 x 3.39 in. (114 x 86 mm), black/white, backlit |
Control Functions/Function Keys | 5 operating keys: 3 master keys for functions: Measurement (M), calibration (C), set/system settings (S), 2 keys for: confirmation/switching menu O.K. (OK), Escape (ESC) 4-directional button for rapid selection of software functions and input of alphanumeric values |
Datalogger | Data memory for up to 525,600 data sets |
Electric Supply | Directly via the IQ Sensor Net when coupled to MIQ module |
Ambient Conditions | Operating temperature: -4 °F … 131 °F (-20 °C … +55 °C) |
Storage temperature: -13 °F … 149 °F (-25 °C … +65 °C) | |
Housing Material | ASA (Acrylonitrile-Styrene-Acryloesterpolymer) |
Protection Rating | IP 66 / corresponding to NEMA 4X (not for direct conduit connections). Conduits need to be connected with flexible adapters (CC-Box), respectively with adapters CC-PM.. |
Dimensions (W x H x D) | 8.27 x 6.69 x 1.57 in. (210 x 170 x 40 mm) |
Weight | Approx. 1.98 pounds (0.9 kg) |
Certifications | ETL, cETL (conforms with relevant UL and Canadian standards), CE |
Electromagnetic Compatibility | EN 61326-1, Class B; FCC Class A |
Integrated Overvoltage Protection | According to EN 61326-1 enhanced overvoltage protection for the entire system, implemented in each component |
Connection Characteristics | Comprehensive EMC shield control; cable topology within IQ Sensor Net system as required, e.g. in the form of a line, tree, star, multiple star; Total cable length: max. 1000 m/1094 yds (without signal amplifying), with signal amplifying module MIQ/JBR additional 1000 m/1094 yds (max 3000 m/3282 yds) |
Warranty | 3 years for defects of quality |
Multi-Parameter Controller MIQ/MC3

Controller module for the IQ SENSOR NETsystem 2020, witht USB and RJ45 interface. The controller family with network connection via ethernet/WIFI interface for the multi-parameter system IQ SENSOR NET 2020 3G for up to 20 sensors:
- The integrated LAN interface allows the simplest network and internet connection (integrated web server) and remote access
- Connection to the PLC made easy by Profibus DP, MODBUS RTU, EthernetIP, Modbus TCP and Profinet
- Quick software updates and data backup via the standard USB interface. The availability or retrieval of online measured values – any time and from anywhere in the world – by means of network-capable computers and smart phones, is becoming more and more important for users in the industrial and wastewater treatment field. Modern online measuring technology must therefore allow a simple and cost-effective connection to local networks as well as to the internet.
WTW sets standards for this with their new controller product series MIQ/MC3, which has a standard integrated ethernet/LAN interface. The connection by means of existing routers into system networks and to the internet can be realized easily and cost-effectively without additional accessories. Thanks to the integrated web servers, data can be retrieved by means of internet-ready devices such as computers, tablets or smart phones, via web browsers.
The field busses PROFIBUS DP and Modbus RTU (connected via RS485 interface), PROFINET, EtherNet/IP and Modbus TCP (connected via LAN) ensure a reliable and direct data transfer to the PLC.
The standard USB interface allows easy software updates and data backup. The latter can also be done from the internet onto a computer. The necessary PC software IQ Software Pack CONNECT also allows the backup of configuration data as well as settings from the system. The user interface for these settings is the same as on the terminal MIQ/TC 2020 3G.
MIQ Module Coupling at Front | Combined mechanical and electrical connection for rapid docking and removal of the MIQ/TC 2020 3G Terminal/Controller (configurated as Terminal) and for docking additional modules |
MIQ Module Coupling at Rear | Combined mechanical and electrical connection, for rapid coupling to MIQ modules, up to 3 modules as a stack mounted unit possible |
Cable Feeds | 2 screw cable glands M 16 x 1.5 |
Terminal Connections | Screw terminal strips |
Terminal area for solid conductors: 0.2 … 4.0 mm2 | |
Terminal area for flexible conductors: 0.2 … 2.5 mm2 | |
accessible by opening cover | |
IQ Sensor Net Terminal Connections | Terminal connections for the IQ Sensor Net are available on each module and can be used as required: |
– for connecting sensors | |
– as an input/output or for looping through/branching of the IQ Sensor Net cable | |
Other Functions | Two LEDs, yellow and red, for monitoring the operating voltage of the IQ Sensor Net; IQ Sensor Net connection, Integrated local identity function; Integrated switchable terminal resistor (SN terminator) |
USB interface | USB-A |
Ethernet port | RJ45 socket or LSA terminal strip can be used |
Datalogger | Data memory for up to 525.600 data sets |
Electric Supply | Directly via the IQ Sensor Net when coupled to MIQ module |
Ambient Conditions | Operating temperature: -4 °F … 131 °F (-20 °C … +55 °C); Storage temperature: -13 °F … 149 °F (-25 °C … +65 °C) |
Housing Material | ASA (Acrylonitrile-Styrene-Acryloesterpolymer) |
Protection Rating | IP 66 / corresponding to NEMA 4X (not for direct conduit connections). Conduits need to be connected with flexible adapters (CC-Box), respectively with adapters CC-PM.. |
Dimensions (W x H x D) | 5.67 x 6.81 x 2.05 in. (144 x 173 x 52 mm) |
Weight | Approx. 1.98 pounds (0.9 kg) |
Certifications | ETL, cETL (conforms with relevant UL and Canadian standards), CE |
Electromagnetic Compatibility | EN 61326-1, Class B; FCC Class A |
Integrated Overvoltage Protection | According to EN 61326-1 enhanced overvoltage protection for the entire system, implemented in each component |
Connection Medium Cable | IQ Sensor Net cable SNCIQ or SNCIQ/UG (underground cable with additional PVC coating): |
2-wire with shield; 2 x 0.75 mm2; Filler cord for easy connection of shield: 0.75 mm2; pressure resistant to 10 bar | |
Connection Characteristics | Energy and data transfer via 2 wire technique; resistant to reversed polarity; Comprehensive EMC shield control; cable topology within IQ Sensor Net system as required, e.g. in the form of a line, tree, star, multiple star; Total cable length: max. 1000 m/1094 yds (without signal amplifying), with signal amplifying module MIQ/JBR additional 1000 m/1094 yds (max 3000 m/3282 yds) |
Warranty | 3 years for defects of quality |
2-Channels Controller DIQ/S 282






Digital system to monitor wastewater treatment plants, with up to 2 sensors
Controller for small and mid-sized wastewater treatment plants including USB-interface and internal data logger– up to 2 sensors, all parameters, available anytime:
- All parameters available (O2, NH4, NO3, COD, PO4, sludge level, …)
- USB-interface and internal data logger by default
- Convenient and available anytime via Ethernet-interface
All parameters at a glance:
The new controller DIQ/S 282 is available with different output signals. Besides the reagent-free measurement of COD, all other parameters needed for a wastewater treatment plant can be measured. By the combination of multi-parameter sensors, up to 20 parameters can be measured and displayed simultaneously.
Up-to-date, safe and independent:
All versions include an USB-interface and an internal data logger by default. Thereby, your valuable data and system configurations can be stored quick and easy. Stay up-to-date with our software updates free of charge and improve your controller for upcoming measurement tasks.
Convenient and available at any time:
Via the connection to the internet you can access your IQ SENSOR NET anytime and anywhere. Monitoring and support from remote saves time, money and nerves. Via the RS 485- and Ethernet- interfaces, the fieldbuses PROFIBUS, Modbus RTU, Ethernet/IP, Modbus TCP and PROFINET are available.
Easy replacement:
The DIQ/S 282 is compatible to almost all currently available components of the IQ SENSOR NET.
Max. number of sensors | 2 |
IQ Sensor Net connections | DIQ/S 282-CR3(-E) (/24V) 1; all others 2 |
Outputs | 3 x (0) 4 … 20 mA, 3 x Relays, Ethernet interface for remote access, Ethernet fieldbusses PROFIBUS or Modbus RTU (options see scopes of delivery) |
Display | Graphic TFT Display; Resolution: 320 x 240 pixel; backlit |
Control Functions/ Function Keys | 5 operating keys: measurement (M), calibration (C), set/system settings (S), |
3 master keys for functions: | |
2 keys for: confirmation/switching menu O.K. (OK), escape (ESC) | |
Arrow keys for rapid selection of software functions and input of alpha-numeric values (up), (down) | |
Electric Supply | 100 … 240 VAC (50/60 Hz), 24 V AC/DC |
MIQ Module Coupling at Rear | Combined mechanical and electrical connection, for rapid coupling to MIQ modules, up to 3 modules as a stack mounted unit possible |
Cable Feeds | 4 screw cable glands M 16 x 1.5 (expansible to M 20 if required) |
Terminal Connections | Screw terminal strips; Terminal area for solid conductors: 0.2 … 4.0 mm2 |
Terminal area for flexible conductors: 0.2 … 2.5 mm2; accessible by opening cover | |
IQ Sensor Net Terminal Connections | Terminal connections for the IQ Sensor Net for connecting sensors |
Ambient Conditions | Operating temperature: -4 °F … 131 °F (-20 °C … +55 °C); Storage temperature: -13 °F … 149 °F (-25 °C … +65 °C) |
Housing Material | PC – 20 % GF (polycarbonate with 20 % fiberglass) |
Protection Rating | IP 67 / corresponding to NEMA 4X (not for direct conduit connections). Conduits need to be connected with flexible adapters (CC-Box), respectively with adapters CC-PM.. |
Dimensions (W x H x D) | 144 x 144 x 125 mm (5.67 x 5.67 x 4.92 in.) |
Weight | Approx. 1,2 kg (2.6 pounds) |
Certifications | CE |
Electromagnetic Compatibility | EN 61326-1, Class A; FCC Class A |
Integrated Overvoltage Protection | According to EN 61326-1 enhanced overvoltage protection for the entire system |
Connection Medium Cable | IQ Sensor Net cable SNCIQ or SNCIQ/UG (underground cable with additional PVC coating): 2-wire with shield; 2 x 0.75 mm2; filler cord for easy connection of shield: 0.75 mm2; pressure resistant to 10 bar |
Connection Characteristics | Power supply and data transmission on these wires; resistant to polarity reversal with respect to switched shield and inner conductor (no damage); comprehensive EMC shield control; Cable topology within the IQ Sensor Net system as required, e.g. in the form of a line, tree, star; total cable length max. 250 m (273 yds) |
Warranty | 3 years for defects of quality |
4-Channels Controller DIQ/S 284



Digital system to monitor wastewater treatment plants, with up to 4 sensors
Controller for small and mid-sized wastewater treatment plants including USB-interface and internal data logger– up to 4 sensors, all parameters, available anytime:
- All parameters available (O2, NH4, NO3, COD, PO4, sludge level, …)
- USB-interface and internal data logger by default
- Convenient and available anytime via Ethernet-interface
All parameters at a glance:
The new controller DIQ/S 284 is available with different output signals. Besides the reagent-free measurement of COD, all other parameters needed for a wastewater treatment plant can be measured. By the combination of multi-parameter sensors, up to 20 parameters can be measured and displayed simultaneously.
Up-to-date, safe and independent:
All versions include an USB-interface and an internal data logger by default. Thereby, your valuable data and system configurations can be stored quick and easy. Stay up-to-date with our software updates free of charge and improve your controller for upcoming measurement tasks.
Convenient and available at any time:
Via the connection to the internet you can access your IQ SENSOR NET anytime and anywhere. Monitoring and support from remote saves time, money and nerves. Via the RS 485- and Ethernet- interfaces, the fieldbuses PROFIBUS, Modbus RTU, Ethernet/IP, Modbus TCP and PROFINET are available.
Easy replacement:
The DIQ/S 284 is compatible to almost all currently available components of the IQ SENSOR NET.
Max. number of sensors | 4 |
IQ Sensor Net connections | DIQ/S 284-CR6(-E) (/24V) 3; all others 2 |
Outputs | 6 x (0) 4 … 20 mA, 6 x Relays, Ethernet interface for remote access, Ethernet fieldbusses PROFIBUS or Modbus RTU (options see scopes of delivery) |
Display | Graphic TFT Display; Resolution: 320 x 240 pixel; backlit |
Control Functions/ Function Keys | 5 operating keys: measurement (M), calibration (C), set/system settings (S), |
3 master keys for functions: | |
2 keys for: confirmation/switching menu O.K. (OK), escape (ESC) | |
Arrow keys for rapid selection of software functions and input of alpha-numeric values (up), (down) | |
Electric Supply | 100 … 240 VAC (50/60 Hz), 24 V AC/DC |
MIQ Module Coupling at Rear | Combined mechanical and electrical connection, for rapid coupling to MIQ modules, up to 3 modules as a stack mounted unit possible |
Cable Feeds | 4 screw cable glands M 16 x 1.5 (expansible to M 20 if required) |
Terminal Connections | Screw terminal strips; Terminal area for solid conductors: 0.2 … 4.0 mm2 |
Terminal area for flexible conductors: 0.2 … 2.5 mm2; accessible by opening cover | |
IQ Sensor Net Terminal Connections | Terminal connections for the IQ Sensor Net for connecting sensors |
Ambient Conditions | Operating temperature: -4 °F … 131 °F (-20 °C … +55 °C); Storage temperature: -13 °F … 149 °F (-25 °C … +65 °C) |
Housing Material | PC – 20 % GF (polycarbonate with 20 % fiberglass) |
Protection Rating | IP 67 / corresponding to NEMA 4X (not for direct conduit connections). Conduits need to be connected with flexible adapters (CC-Box), respectively with adapters CC-PM.. |
Dimensions (W x H x D) | 144 x 144 x 173 mm (5.67 x 5.67 x 6.81 in.) |
Weight | Approx. 1,7 kg (3.7 pounds) |
Certifications | CE |
Electromagnetic Compatibility | EN 61326-1, Class A; FCC Class A |
Integrated Overvoltage Protection | According to EN 61326-1 enhanced overvoltage protection for the entire system |
Connection Medium Cable | IQ Sensor Net cable SNCIQ or SNCIQ/UG (underground cable with additional PVC coating): 2-wire with shield; 2 x 0.75 mm2; filler cord for easy connection of shield: 0.75 mm2; pressure resistant to 10 bar |
Connection Characteristics | Power supply and data transmission on these wires; resistant to polarity reversal with respect to switched shield and inner conductor (no damage); comprehensive EMC shield control; Cable topology within the IQ Sensor Net system as required, e.g. in the form of a line, tree, star; total cable length max. 250 m (273 yds) |
Warranty | 3 years for defects of quality |
*More instruments are available, please liaise with us if any of your required instruments is not listed above.