or applications where monitoring is infrequent, or where it is required to spot-check the operation of pumps or other process equipment, such as the flow through heat exchangers, the SiteLab model SL1188P portable ultrasonic flowmeter can be used. It offers a great advantage in ease of setting up since it utilises Bluetooth communications between the flowmeter and a Tungsten Palm PDA device to allow for greater portability and increased battery life. The software included with the system enables the PDA display to be used in the same way as the interactive display on the model SL1188 fixed unit. The PDA display and stylus offers the same functions and ease of setting up of parameters that are downloaded to the flowmeter by Bluetooth wireless technology from up to 10 m away. The Tungsten PDA offers enhanced functions for logging and trending in a realtime environment or for later visual interpretation with its unique graphing function