What is a key function of the pressure gauge in a sprayer?

The key function of the pressure gauge in a sprayer is to measure system pressure at various points. This measurement is crucial for ensuring that the sprayer operates within the optimal pressure range for effective application of pesticides. Proper pressure levels help maintain consistent droplet size and uniform application, which are essential for achieving the desired coverage and effectiveness of the pesticide.

Monitoring the pressure allows the operator to adjust the flow rate and nozzle performance as needed. If the pressure is too low, the sprayer may not deliver enough pesticide, resulting in inadequate control of pests or diseases. Conversely, if the pressure is too high, it can lead to drift, where the pesticide moves away from the target area, potentially harming beneficial organisms or off-target plants.

The other options describe functions that are not performed by the pressure gauge. Temperature regulation, cleaning, and viscosity measurement involve different mechanisms or devices within the sprayer system, highlighting the specific role of the pressure gauge in managing system performance.