Lettuce Handbook

Sensors

Temperature

Recommended Sensor : Resistance Temperature Detector (RTD) located in the Aspirated Box

Relative Humidity
Recommended Sensor : Accuracy and stability of the sensor are important for reliable performance in the relatively harsh greenhouse environment.

Carbon Dioxide Concentration
Recommended Sensor : Infra Red Carbon Dioxide Sensor

Light

Recommended Sensor : Quantum Sensor measuring Photosynthetically Active Radiation (PAR 400-700 nm). Foot- candle sensors and lux meters are inappropriate because they are used to quantify the sensitivity of the human eye and do not necessarily measure light used for photosynthesis.

Dissolved Oxygen (DO)

Recommended Sensor : Reliability and easy maintenance are important for this delicate sensor.

pH

Recommended Sensor : Reliability and easy maintenance are important for this delicate sensor.

Electrical Conductivity (EC)

Recommended Sensor : Reliability and easy maintenance are important for this delicate sensor.