This read-only INTEGER reports the configured hysteresis value applied to the high/low alarm limits for a monitored channel on the TH2E device; the source DESCRIPTION for this specific object is blank, so its role is inferred from its position alongside limitHi and limitLo in the watch-value table. An admin reads this to understand the margin the device uses before clearing an alarm condition, preventing rapid alarm flapping when a reading hovers near a threshold. For illustration, this object might report a hysteresis of 10 (1.0 degree), meaning the reading must fall 1 degree back inside the limit before the alarm clears.