Interface for WATERMARK sensor or other moisture probes

(SMX)

• Supply Volts: 4 to 15 VDC
• Frequency output at open circuit: 50 hz
• Frequency output at 0 ohms: 12 khz
• Current output (also supply current) dry: 0.2 mA
• Current output (also supply current) wet: 1.0 mA
• Current output (also supply current) sensor short circuit: as high as 1.5 mA
• Voltage output: 0.2 volts to 1.0 volts typical
• Voltage output with sensor short circuit: as high as 1.5 volts
• Supply variation: >0.01% per volt
• Operating Temperature: -0°C to +70°C
• Temperature below 0°C: no meaningful signal