Jones J-4038 and J-3038 wet barrel fire hydrants from Mueller Water Products can be equipped with a Hydro-Guard pressure monitoring sensor installed in the dome top and an Echologics distribution leak detection (DX) node as the nozzle cap. The Hydro-Guard sensor monitors system pressure and can send alert via cellular communications within minutes if a spike occurs. Data is logged for analysis and can be stored up to two years on a secure web server. The Echologics node uses acoustic sensors to find leaks on a variety of pipe materials and water distribution mains. The node is preassembled and consists of an acoustic sensor, analysis software, network hardware, batteries and an antenna. 800-523-8618; www.muellerwaterproducts.com.