Setting OLED sensors to SI units only
How do I change the display of the units on a sensor with a display
To lock your Wireless Temperature, pH, or Conductivity Sensors with Displays into a mode in which only SI units are displayed, please use the following instructions.
Press power button five times quickly to get this menu on the display: 
Press power button two times quickly to disable SI-unit-only mode. The display will briefly show this message:
Press power button three times quickly to enable SI-unit-only mode. The display will briefly show this message: 
Related Products
- Wireless Temperature Sensor with Display (PS-4201)
- Wireless pH Sensor with Display (PS-4204)
- Wireless Conductivity Sensor with Display (PS-4210)
For further assistance, please contact Technical Support at support@pasco.com, through chat on this site during our business hours, or through our web form. Tech Support can also be reached by phone at 1-800-772-8700.