Wema is a leading manufacturer of liquid level and temperature sensors for fuel tanks, water tanks, and waste water tanks. They produce capacitance level sensors for measuring fuel levels which are well suited for anti-siphon and fleet management applications but not water. They also make fuel and water temperature sensors with an operating voltage of 6-24V, temperature response time of 3 minutes, operating temperature range of -25°C to 120°C, and switch-based alarm that turns off when temperature rises above set point. Wema is located in Fort Lauderdale, Florida and can be contacted during regular business hours.