The FrSky Variometer sensor calculates the altitude from atmospheric pressure. Atmospheric pressure will get lower as you go up in altitude, using this the sensor will estimate the altitude.

When used with a FrSky transmitter like the Taranis, you can actually create mixes that use the feedback from the vario sensor. For example, you can have your motor reduce power when you reach a set altitude. An excellent feature for sites that have flight ceilings.

Another nice feature of the vario is the ability to connect the FSH-01 sensor hub, thus allowing the X8R receiver's to use the existing analog sensors.

Features:

• Capable of connecting directly to the telemetry receivers without the sensor hub.
• Backwardly compatible with existing sensor hub and sensors.
• Smart Port enabled, realizing two-way full duplex transmission.

Specification:

• -700 ~ 10000m (-2,300' - 32,800') with 1m (39") resolution
• Voltage: 4 -10
• Current: 30 mA
• Dimensions: 31.1mm x 18.3mm x 6mm (L x W x H)
• Weight: 3.1g