CNTD01 CONDUCTIVITY SENSOR
This handheld device provides a qualitative visual indicator of the conductivity of different solutions, acids or salts. Two brass probes can be touched to a solid substance, or immersed in a liquid, to show conductivity on green LEDs that range from 1 to 10.
Each probe is 53mm long with a diameter of 3mm. 
Overall length of the meter and probes together is 14cm. 
Includes a 12V battery and operating instructions.
 
    
             
  
 