Profile: A & P Chambers Ltd. is a provider of electronic design service. We manufacture a range of specialized electronic instruments. We also specialize in design works of electronic equipment and computer controlled systems. Water level loggers, counter equipment and retriever systems are our main products. Our water level logger system is a sophisticated unit for automatically recording water height at pre-programmed time intervals for up to two years. It can be used for measuring soil conductivity, monitoring the height of water in rivers, and for measuring flow rates. The probe has been re-designed so that it can be placed directly into the water without the need of a protective tube. Our Retriever System is a proven radio-detection system for invisibly marking locations on the ground. It has a pinpoint mode, and can be used for monitoring path erosion, or marking archaeological sites.