Product Details

Alpha COND 500 1/4-DIN 2-Wire Conductivity Transmitter



Product Features


:: The alpha 500 series transmitter prevents output interference due to electrical noise or leakage from the input source. Cross talk between multiple transmitters in the same loop is also eliminated.

:: Out-of-range Output Current Indicator - Monitor your process effectively using the optional out-of-range current indicator. When the monitored value exceeds the measurement range, the alpha 500 Transmitter indicates an out-of-range measurement by emitting a 3.8 mA output current.

:: Hold Output Current Indicator - Use the optional HOLD output current indicator for your process control purposes. Configure the transmitter to emit the pre-set 22 mA output current to indicate ‘HOLD’ mode during calibration or set up mode.

:: Scalable 4/20 mA Current Output - Assign Conductivity values at 4 and
20 mA for better resolved output at chart recorder or other peripheral devices.

:: Custom Dual Display LCD - Primary and secondary display are available for simultaneous display of Conductivity and Temperature values. Allows instantaneous viewing of measured readings and transmitter set up configurations.

:: Easy Push Button Operation - Simply calibrate or adjust setup configuration with just a few touches of the buttons. The alpha CON 500 push-button offset adjustment makes calibration simple.

:: Temperature Compensation - Compensates variance in the measured readings due to temperature fluctuations, either Automatically (with Pt 100) or Manually (Process and Calibration temperatures can be set separately).

:: Panel or Wall Mount, IP65 Weatherproof Housing - The alpha 500 series transmitter has the flexibility to be mounted on the wall or in a control panel. In addition, the IP65 rated housing allows the transmitter to be installed outdoors or indoors. Mounting accessories are included for both types of mounting.

:: DC Voltage - Transmitters operate on a 12 to 24V D.C. power supply and multiples can be installed in a serial loop. Operations are not disrupted even if one of the transmitters requires service.




Product Specification


Conductivity Range

R1 (R2): 0-20 µS/cm
R2 (R3): 0-200 µS/cm
R3 (R4): 0-2000 µS/cm
R4 (R5): 0-20 mS/cm
R5 (R6): 0-200 mS/cm


0.01 µS/cm
0.1 µS/cm
1 µS/cm
0.01 mS/cm
0.01 mS/cm
0.1 mS/cm


±1% of full scale reading in respective range


-10 °C to 125 °C (14 °F to 257 °F)


0.1 °C (0.1 °F)

Relative Accuracy

±0.5 °C (±0.9 °F)


Pt100 (3 wire / 2 wire)

Temperature Compensation


Cell Constant

User-selectable (0.10 to 10.00)

Temperature Coefficient

0 to 10% (selectable)

Normalisation Temperature

20.0 °C to 25 °C


Dual Display Custom LCD

Power Requirements

110 or 220 VAC to 9 V DC Adapter


96 x 96 x 66 mm (3.78 x 3.78 x 2.6 inch)


210 g


Ordering Information


Order No.



Alpha COND 500 Conductivity 2-Wire Transmitter with 4-20mA Output and 12-24 VDC (Unit only)


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Alpha 500 550 560 Series


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