The AS950 refrigerated sampler is optimized for indoor applications where temperature control is required for sample preservation. Every AS950 is equipped with a peristaltic pump with spring-mounted rollers and a standard liquid detect sensor for best-in. Download (login necessary) Application Note – OTT netDL 1000 with IP Camera D-Link DCS 7110. HACH LDO² Sensor Firmware - EN Version: 2.92. 3.38 Comments Download (login necessary). OTT WAD 200/314 - USB interface driver - EN Version: V 2.12.28 Comments Download (login necessary).