Q46CT Toroidal Conductivity Monitor

Non-Contacting Sensor for Chemically Aggressive Applications

General Details
Non-Contacting Conductivity System!
Conductivity measurement in aggressive chemical solutions or in water systems containing large amounts of solids, oils, and greases is very maintenance intensive using conventional 2 or 4 electrode sensors. ATI’s Model Q46CT employs an inductive (toroidal) sensor that allows measurement in corrosive samples with virtually no maintenance.

Toroidal Conductivity Monitoring Systems contain a variety of features and options to meet virtually any conductivity water quality monitoring and control application. While not suitable for low level conductivity measurement, toroidal monitors are an excellent choice for high conductivity applications. The Q46CT is also available as a concentration monitor (see below).

ATI’s Q46 platform represents our latest generation of monitoring and control systems. Control features have been expanded to include an optional 3rd analog output or an additional bank of low power relays. Digital communication options now include Profibus-DP, Modbus-RTU, or Ethernet-IP variations.

ATI’s Model Q46CT toroidal conductivity system is designed for online monitoring of chemically aggressive process solutions. This sensor consists of two metallic ribbon coils that are fixed in place by the sensor jacket material. The drive coil establishes a strong magnetic field around the sensor body which induces a current in the process solution. The sensing coil is used to measure the induced current in the process solution The magnitude of this current is proportional to the conductivity of the process solution.
The toroidal sensor is available in Noryl to ensure sensor wetted materials are chemically resistant to both strong acids and strong bases. Sensor material is also non-conductive, thereby isolating the sensor from electrical noise and ground loops that Q46 ANALYZER can influence the integrity of the measurement. This material also makes the sensor resistant to electrode coating, as most substances do not adhere to the sensor material.

Sensors can be submersion-mounted using the 3/4” NPT pipe thread at the back of the sensor for easy installation in open tanks. The sensor may also be pipe-mounted using the special 2” CPVC tee fitting which has an alignment key to automatically orient the sensor to the sample flow.

A Pt1000 RTD in the sensor body provides temperature input for both display and automatic temperature compensation of the conductivity measurement.

    Non-Contacting Sensor with Virtually No Maintenance!   
Conductivity monitors can be used to monitor and display the concentration of acids or bases used in various chemical process applications. The Q46CT is available with pre-loaded tables allowing direct display of concentration for solutions of sodium chloride (NaCl), hydrochloric acid (HCl), potassium hydroxide (KOH), and sodium hydroxide (NaOH).

In addition to these standard tables, the user may enter their own table data for other chemicals, or may edit the standard tables supplied by ATI. Custom tables require data on both concentration vs. conductivity and temperature vs. conductivity for the chemical of interest.


Concentration version for direct display of chemical concentrations.

Extra Outputs
Expansion board to add a third 4-20 mA analog output or to add three additional non-isolated low power relays.

Wide range capability, with selectable ranges of 0-200.0 uS up to 0-2.000 S provide maximum application flexibility.

AC or DC Power Options
Power options include universal 100-240 VAC +/- 10%, or 12-24 VDC.

Programmable range options from 0-200 PPB up to 0-200 PPM provide maximum application flexibility.

AC or DC Power Options
Power options include universal 90-260 VAC or 12-24 VDC.

Analog Output Options
Two isolated 4-20 mA outputs are standard, with an option for a third output if required. Default setting provides analog outputs for conductivity and temperature.

PID Output
Standard PID control function assignable to one analog output.

Digital Communications
Available in either Profibus-DP, Modbus-RTU or Ethernet-IP.

Relay Assignable
Three SPDT relays are standard, with relay functions programmable for alarm, control, or trouble indication. Three additional low power relays available as an option.

Flexible Mounting
NEMA 4X (IP-66) enclosure is suitable for wall, pipe, or panel mounting.

Clear Display
Back-lit large LCD display provides clear visibility in any lighting conditions. A scrolling second line on the display provides additional information and programming prompts.