How does the VPD-monitor measure canopy temperature?

The sensor module has a built-in advanced infrared temperature sensor. If you hang the sensor-module 1 meter (3 feet) above the canopy, you will get the most accurate reading.

Can you measure VPD without leaf temperature?

To be honest?! NO! other vpdmonitors that do not measure leaf temperature are taking you for a fool. They use ambient temperature with a sensor that’s somewhere in-between the Canopy. But because of air circulation this method does not meet our standards…