Aquamatic S50 Sampler, Not suitable for Outdoor use ● No Sample Frost Protection ● Ambient range: -10°C to +50°C  ●  Includes Ancillary Connection cable for flowmeter integration (pulse, contact or 4-20mA input).  This sampler is a low maintainance, high quality yet reasonable cost automatic liquid sampler.  The EPA has preferred vacuum for years, and no wonder.  With high velocity horizontal transport rates and consistent volumes, the Aquamatic samplers are the go to for your demanding sampling needs.