Building a Water Conductivity Sensor for DAQ with RS232 and 4-20mA Output

The discussion focuses on designing a water conductivity sensor compatible with a data acquisition system (DAQ) featuring an RS232 serial port and 4-20 mA output. Key design considerations include the measurement range, accuracy, and the sensor's cell constant, which depends on electrode surface area and geometry. Materials suitable for sensor electrodes include stainless steel, graphite, copper, and titanium. Calculating the cell constant is critical and challenging due to the sensor geometry. It is suggested that for single-sensor applications, purchasing an off-the-shelf conductivity sensor may be more efficient, with Sensorex recommended as a reputable brand. The original poster is starting from scratch without a block diagram and seeks guidance on both sensor design and circuit implementation.
AI summary based on the discussion. May contain errors.