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Q45CT Toroidal Conductivity Monitor


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 Q45CT 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 Q45CT is also available as a concentration monitor (see below).

Toroidal Sensor

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 Q45 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 Q45CT 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.


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 115/230 VAC.

Analog Output Options

Two isolated 4-20 mA outputs are standard. Default setting provides analog outputs for conductivity and temperature.

PID Output

Standard PID control function assignable to one analog output.

Relay Assignable

Two SPDT relays are standard, with relay functions programmable for alarm, control, or trouble indication.

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.