Specifications include, but are not limited to: The sampler shall be capable of being programmed to rinse the suction line with the source liquid up to three times. The sampler shall have a standard 4-20mA flow proportional input compatible with most flow meters without additional interfacing. Samples shall be equal in volume and shall be taken at variable times proportional to flow. The sampler shall have four standard digital alarm outputs capable of direct wiring to a Programmable Logic Controller (PLC) or data logger (5 volt, 100 mA). Output alarms shall include: Program started, Program completed, Pump error, Distributor jammed, 3-way valve control , Taking sample, Pumping forward, Powered up, Pumping reverse, Bottle full, and Delay before sample. The sampler shall store a one-minute temperature data report retrievable by an IBM-compatible computer using a terminal emulator tool. The liquid detection system shall minimize the effects of changing head, intermittent flow in the suction line, or variable battery conditions on sample volume. After initial detection of liquid, the sensor shall monitor for the presence of liquid during the sample collection sequence. The compressor is rated at (1/5 Hp for 150V). The controller shall not require a separate heater. The pump shall include a latched housing cover and thumbscrew opening for the replacement of pump tubing. The pump shall include a built-in magnetic safety interlock. The sampler will sense the presence of the liquid via a non-wetted, non-conductive detector. The sensor shall not be dependent on, or affected by, any chemical or physical property of the liquid or its contents. The sensor shall not require routine maintenance or cleaning