Manifold and valve assembly for a smoke/pollution detection syst

Manual or automatic drainage device for downspouts

Manual to electronic automatic valve conversion apparatus

Marine riser fill-up valve

Matric potential responder improvements

Method and apparatus for irrigation control

Method and apparatus for measuring water content

Method and device for automatic irrigation

Methods of and means for accurately measuring the calorific valu

Moisture and pressure sensitive fluid control circuit

Moisture monitor and control system

Moisture monitoring and control system

Moisture monitoring system

Moisture sensing switch

Moisture sensitive irrigation valve control

Moisture sensor

Moisture sensor

Moisture sensor and control system for sprinklers and method...

Moisture sensor and irrigation control system

Moisture-actuated apparatus for controlling the flow of water