Welcome to Southwell Controls Ltd., manufacturer of high quality water and wastewater samplers, and seller of instrumentation products. We are proud to announce that Southwell Controls Ltd. has a NEW OWNER! Under the new ownership, we have made improvements to both the company and our line of samplers. We make the industry's BEST SAMPLERS, with minimal servicing and repair. If you're looking for a water sampler, a wastewater sampler, a liquid sampler, or an effluent sampler, Sirco Samplers is the right choice for you. See how our patented vacuum sampling technology is the best in accuracy, simplicity, reliability and durability. So visit our sampler website today.