Proximity Sensor Manufacturers
- Avago Technologies - mainly LEDs
- Vegetronix - Vegetronix specializes in low cost soil moisture sensor probes, grow lights, data logers, and SDI-12 protocol translators, and irrigation systems and solutions. Their moisture sensor probes are sensitive and accurate enough to be used in research grade instrumentation, but because of their extreme low cost they can be deployed on a massive scale in irrigation systems.
- Willow Technologies - A wide variety of specialized and hard to find resistors, capacitors and sensors. Located in the UK.