diff --git a/docs/monitor/sensors.md b/docs/monitor/sensors.md
index e5341fb..99c6a75 100644
--- a/docs/monitor/sensors.md
+++ b/docs/monitor/sensors.md
@@ -1,9 +1,54 @@
 # sensors
 
 ## Description
+An array of sensor objects that make up the fan enclosure object. The sensors are what's monitored to determine the functional state of the fan.
 
+A sensor's functional range is determined by the following equation(where *[target]* is current requested target of the fan):
+* Minimum = ([target] * (100 - [`deviation`](deviation.md)) / 100) * `factor` + `offset`
+* Maximum = ([target] * (100 + [`deviation`](deviation.md)) / 100) * `factor` + `offset`
+
+Therefore, a fan sensor must be above the minimum and less than the maximum to be deemed functional.
 
 ## Attribute Value(s)
-
+* `name` - string
+  * The name of the fan tach sensors located under the
+`/xyz/openbmc_project/sensors/fan_tach` D-Bus path.
+* `has_target` - boolean
+  * Whether this sensor D-Bus object contains the `Target` property or not.
+* `target_interface` - string (Optional)
+  * The D-Bus interface containing the `Target` property. This defaults to `xyz.openbmc_project.Control.FanSpeed` for RPM controlled fans or can be set to `xyz.openbmc_project.Control.FanPwm` for PWM controlled fans.
+* `factor` - double (Optional)
+  * A value to multiply the current target by to adjust the monitoring of this sensor due to how the hardware works. This sensor attribute is optional and defaults to 1.0.
+* `offset` - integer (Optional)
+  * A value to shift the current target by to adjust the monitoring of this sensor due to how the hardware works. This sensors attribute is optional and defaults to 0.
 
 ## Example
+<pre><code>
+{
+  "fans": [
+    {
+      "inventory": "/system/chassis/motherboard/fan0",
+      "allowed_out_of_range_time": 30,
+      "functional_delay": 5,
+      "deviation": 15,
+      "num_sensors_nonfunc_for_fan_nonfunc": 1,
+      "monitor_start_delay": 30,
+      "fan_missing_error_delay": 20,
+      "nonfunc_rotor_error_delay": 0,
+      <b><i>"sensors": [
+        {
+          "name": "fan0_0",
+          "has_target": true,
+          "target_interface": "xyz.openbmc_project.Control.FanPwm"
+        },
+        {
+          "name": "fan0_1",
+          "has_target": false,
+          "factor": 1.45,
+          "offset": -909
+        }
+      ]</i></b>
+    }
+  ]
+}
+</code></pre>