The MTM 3000 Series miniature submersible transmitter from PMC Engineering is designed for depth and level measurements of groundwater, wastewater and seawater where space is limited. Pressure ranges from 0-10 to 0-500 psi. Operating temperature is 25 to 125 degrees F. The 0.39-inch titanium housing offers high performance in very small areas, such as 1/2-inch monitoring wells, stand pipes and boreholes. The highly developed, piezoresistive sensing technology provides high accuracy of 0.1 percent and long-term stability of better than 0.1 percent per year. The technology also provides a high overpressure of at least three times the rated range without any degradation of sensor performance. When used with the MP 11 moisture protection option, the user can expect maintenance-free operation for an extended period of time, typically more than 10 years. 203/792-8686; www.pmc1.com.