Alpha samplers are suitable for use in oceans, deep lakes, and corrosive waters (do not use when mercury concentrations exceed 1 ppm). Choose horizontal samplers for sampling at the surface, thermocline, or just above the bottom. Urethane end seals snap shut with minimum surface disturbance on messenger contact. Drain valve provides easy sample removal. Samplers include a carrying case; order messenger and line separately. Silicone end seals are available by special order; call our Applications Specialists for details.