With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoEnvMonFanStatusEntry
cisco Environmental Monitor Fan Status Entry
1.3.6.1.4.1.9.9.13.1.4.1
An entry in the fan status table, representing the status of the associated fan maintained by the environmental monitor.
Back to CISCO-ENVMON-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoEnvMonFanStatusEntry on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.