The WSG30 system from Sensaphone is a Web-based temperature monitoring system that provides low-cost, 24/7 remote monitoring of freezers and coolers that contain pharmaceutical products. The system uses wireless sensors to detect problems such as temperature changes (from -109°F to 115°F), humidity fluctuations, water leaks, and power outages, and is ideal for locations where hard-wiring sensors is difficult or cost prohibitive. A single WSG30 unit can support up to 30 wireless sensors; when the WSG30 system detects a problem, it instantly sends alerts to up to 32 people by email, text message, SNMP, or Modbus, enabling personnel to take corrective action and save critical inventory. Users can make programming changes, access status conditions, and review data logs online through any Web-enabled device.