FYI: If you want to monitor the temperature of HP Proliant servers and you've installed SNMP and the Compaq Insight Management software. You can create a Custom MIB Poller using OID (1.3.6.1.4.1.232.6.2.6.8.1.4).
cpqHeTemperatureCelsius: This is the current temperature sensor reading in degrees Celsius. MIB value type should be set to Raw Value, and type is set to none.
Unfortunately, you can't yet perform math on the Custom MIB Poller to convert the value to Fahrenheit.