How do I charge my sensor?

Charge your sensor by using a wireless charger 

Most of our sensors can be wirelessly charged. When the grey box from the sensor only has an output where the sensor connects and no black charging port at the bottom, the sensor can be charged wireless. Charge the sensor simply by putting the sensor on your wireless charger. Within 4-6 hours the sensor is ready for another year. The sensor can be charged with any wireless Qi certified charger but we recommend to use the Choetech T511. 

How to charge your sensor step by step:

1. Plug the charger in a power socket
2. Detach the casing from the sensor by taking off the strap  
3. Place the sensor on the charger as depicted below (the 30MHz sticker must show when the sensor is placed on top of the charger)
4. Charger will show a blue light*
5. Charge the sensor for 4-6 hours 
6. Blue light turned red/purple
7. Sensor is ready to measure again

Tips:

• For a Choetech charger you will see that the blue led flashing three times when charging starts, during charging the led is blue, and when the battery is charged the led will turn off.  
• Try to charge your phone (wireless chargeable) with the charger. 

Charge your sensor by using the wired charger 

Some sensors need to be charged with the 30MHz wired charger. These sensors can be recognized by the presence of a charge port (see picture). If you need a wired charger you can request this by contacting 30MHz. 

Charge your sensor with a wired charger, step by step: 

1. Plug the charger in a power socket 
2. Take off the black cap from the charger port 
3. Attach the charger to the charger port
4. Charge the sensor for 4-6 hours 
5. Sensor is ready to measure again 

Replace the batteries of the sensor

The only sensor where batteries need to be replaced manually is the temperature/humidity sensor version SHT25 (see image below). The voltage range for the SHT25 sensor is between 3.5V (full) and 2.6V (replace).

We recommend to replace the empty batteries with Energizer Ultimate Lithium AA batteries, these batteries have an extended temperature range compared to standard AA batteries.