Power requirements: 5 VDC @ ~165 mA (heater on) / ~60 mA (heater off)
Current Consumption: 150mA
Operating temperature: 14 to 122 °F (-10 to 50°C)
It has a long service life and reliable stability.
DO output: TTL digital 0 and 1 ( 0.1 and 5V)
AO output: 0.1- 0.3 V (relative to pollution), the maximum concentration of a voltage of about 4V