Air speed measurements in harsh conditions 0.5m/s to 30m/s range Two channel frequency input Over or under range trip points Analogue data output The Austdac Air Speed Monitor, Type AASM1, is used to measure wind speed primarily in mining situations. The AASM1 comes in two parts, the Air Speed Monitor 1 Anemometer, Type SCGR1 and the 2 Channel Frequency Transmitter, Type SILBUS-TX2F. The SCGR1 measures the air speed while the SILBUS-TX2F processes that information and can activate relays, strobes or transmit the information via SILBUS. The AASM1 has three trip levels: Warning 1 Warning 2 Trip These points can drive a relay contact and/or a flashing strobe. The wind speed can be monitored via three protocols: SILBUS 4-20mA Modbus RS-485