TempSensing.com has been providing cost-effective solutions for Temperature, Humidity & CO2 Sensing, Building Automation, Remote Monitoring, and other applications since 2005.
Modbus Enabled Temperature / Humidity / CO2 Sensors
DataNab offers Modbus Enabled Temperature / Humidity / CO2 Sensors that can communicate over IP using ModbusTCP and/or over RS485 using ModbusRTU.