Sorry got in late here but I believe this thread started as a RFI on SNMP Pollable Thermometers. You may want to inquire further with American Power Conversion http://www.apcc.com/. They make a component called a Measure-UPS that can monitor temperature and humidity. The unit mounts in an expansion unit and MIB is mapped to temperature and humidity It also has I believe four dry contact switches that can be hooked to a variety of devices. The status of the switches are controlled via dip-switches on the unit as to whether the are normally open or normally closed. I have used the Measure-UPS unit with a microswitch mounted in my remote equipment door. If some on enters a trap is sent and alerts my SNMP manager. I can verify if the entrance is authorized or not. HTH _Thomas