Welder User Manual
44 
 WATER LEVEL SENSOR 
This Incubator is equipped with a water level sensor for the humidifying pan. The sensor is set 
automatically when the humidifying pan is installed. Take care not to damage the sensor when removing 
or installing the humidifying pan. 
      When the humidifying pan is removed (side view) 
      When the humidifying pan is installed (side view) 
Note: Make sure that the humidifying pan is all the way to the back and that the sensor comes down 
when you install the humidifying pan. 
Note: 
• Lift the sensor before installing the humidifying pan if the sensor is in the lower position after 
maintenance. 
• When installing the humidifying pan, make sure that the pan is set properly and that sensor comes down 
into the pan. “RH PAN” will be displayed in reverse video in the status display field on LCD panel if the 
sensor does not come down completely. If necessary, set the pan again in the proper location. 
• The sensor detects the water level every 30 minutes and just after the outer door is closed. It takes 
several seconds to detect the water level. Therefore, “RH PAN” may displayed in reverse video several 
times in the status display field on LCD panel after the outer door is closed even when the humidifying pan 
is full. 
CAUTION 
Foreign particles on the water surface can adhere to the water level sensor and fittings by capillary action 
because the sensor is always in the water. The adhered foreign particles degrade sensor performance 
and “RH PAN” may displayed in reverse video in the status display field on LCD panel even though there 
is sufficient water in the humidifying pan. Be sure to wipe OFF any dirt on the water level sensor with 
disinfectant alcohol whenever you change the humidifying water. When cleaning the sensor, take care 
not to apply excessive force to the lead wires. 
Sensor 
Pan 
Pan 
Sensor 










