Reliable Conductivity Measurement, with Self-Checking Sensors!

 While the theory of monitoring conductivity is simple, in practice it can be very frustrating. While simple 2-electrode sensors are inexpensive and can provide accurate data, continuous water quality monitoring of even relatively clean water can foul the electrodes and degrade the measurement. Maintaining accuracy is made more difficult when the amount of solids dissolved in the process varies over a wide concentration range.

ATI’s Q46C4 4-Electrode Conductivity Water Quality Monitor is the answer for monitoring almost any water-based process. Drinking water, plating bath solutions, cooling water, process wash water, or virtually any other aqueous system can be monitored accurately and reliably. The unique drive/control scheme used in the 4-electrode system allows a single sensor to be used in conductivity ranged from 0-200 μS to as high as 0-2,000 mS (0-2S). For chemical mixing applications, a concentration display can be selected.

SENSOR CONFIGURATIONS

Sensors for the Q46C4 system are available in a variety of mounting configurations: convertible-style with 1” NPT threads for pipe or tank mounting, 1-1/2” or 2” sanitary-style fittings in 316 stainless steel, and insertion-style for 1-1/4” NPT hot-tap assemblies that allow the sensor to be removed from service without shutting down the process. For low flow bypass applications, a Noryl sensor with quick-disconnect cable and acrylic flowcell are available.

  ATI's 4-E CONDUCTIVITY SENSORS    

CONCENTRATION MONITOR

Conductivity monitors can be used to measure and display the concentration of acids or bases used in various chemical process applications. The Q46C4 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.

PRODUCT FEATURES

Adaptability

Concentration version for direct display of chemical concentrations.

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.

Extra Outputs

Expansion board to add a third 4-20 mA analog output

Flexibility

Wide range capability, with selectable ranges of 0-2000 μS 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.

PID Output

Standard PID control function assignable to one analog output.

Digital Communications

Communication options for Profibus-DP, Modbus-RTU, or Ethernet-IP

Relay Contacts

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 condition. A scrolling second line on the display provides additional information and programming prompts.