Shop Honeywell Home Wireless Environmental Sensors at GeoArm Security. Browse 5800-Series (345 MHz) and PROSiX encrypted temperature, flood, and shock sensors, along with wireless transmitters and external probes for residential or commercial properties. These devices detect extreme temperatures, water leaks, flooding, impact, and vibration, then alert the connected alarm system to potential environmental threats or property damage. Honeywell-Compatible security systems support GeoArm 24/7 professional UL-listed central station monitoring or DIY self-monitoring with no long-term contract.