You can get a list of the status of all of the hardware sensors with:
$VMHost = Get-VMHost -Name esxi.yourdomain.com
$HealthStatusSystem = Get-View $VMHost.ExtensionData.ConfigManager.HealthStatusSystem
$HardwareStatusInfo = $HealthStatusSystem.Runtime.HardwareStatusInfo
$SystemHealthInfo = $HealthStatusSystem.Runtime.SystemHealthInfo
$SystemHealthInfo.NumericSensorInfo | ForEach-Object {
if ($_) {
$Sensor = $_
$Report = "" | Select-Object VMHost,Device,Type,Status
$Report.VMHost = $VMHost.Name
$Report.Device = $Sensor.Name
$Report.Type = "Sensor"
$Report.Status = $Sensor.HealthState.Key
$Report
}
}