{"product_id":"solinst-425-discrete-interval-sampler","title":"Solinst 425 Discrete Interval Sampler","description":"\u003cp\u003eThe Solinst 425 Discrete Interval Sampler collects a groundwater sample from one exact depth without mixing it with water from other depths in the well column. Before lowering, the stainless-steel sampler body is pressurized through its tubing so water cannot enter it. It is lowered on a suspension\/safety line to the exact target depth, then the pressure is released (vented). A floating check ball inside the sampler body (PTFE ball, which sinks, at the bottom; polypropylene ball, which floats, at the top) opens under hydrostatic pressure, filling the sampler with water from that specific interval; re-pressurizing before retrieval reseals the balls so the sample stays isolated on the way back up. At the surface, a separate Sample Release Device lets the operator decant the sample in a slow, controlled stream by pressing its stem into the decanter body, minimizing agitation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo you have everything you need?\u003c\/strong\u003e The 425 requires a Solinst High Pressure Hand Pump (sold separately) to pressurize and release the sampler, plus a reel sized to the tubing length in use. Replacement parts and reels are available in the \u003ca href=\"https:\/\/envirotechonline.com\/products\/solinst-425-discrete-interval-sampler-parts-accessories\" title=\"Solinst 425 Discrete Interval Sampler Parts \u0026amp; Accessories\" rel=\"noopener\" target=\"_blank\"\u003eSolinst 425 Discrete Interval Sampler Parts \u0026amp; Accessories\u003c\/a\u003e collection.\u003c\/p\u003e","brand":"Solinst","offers":[{"title":"1\" x 2ft","offer_id":48181453029566,"sku":"114966","price":170.88,"currency_code":"USD","in_stock":true},{"title":"1\" x 4ft","offer_id":48181453062334,"sku":"114967","price":310.32,"currency_code":"USD","in_stock":true},{"title":"1.66\" x 2ft","offer_id":48181453095102,"sku":"114968","price":300.66,"currency_code":"USD","in_stock":true},{"title":"1.66\" x 4ft","offer_id":48181453127870,"sku":"115011","price":415.91,"currency_code":"USD","in_stock":true},{"title":"2\" x 2ft","offer_id":48181453160638,"sku":"115012","price":507.8,"currency_code":"USD","in_stock":true},{"title":"2\" x 4ft","offer_id":48181453193406,"sku":"115013","price":685.14,"currency_code":"USD","in_stock":true},{"title":"425-D Deep Sampling 1.66\" x 2ft","offer_id":48181453226174,"sku":"115342","price":698.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/425hero.jpg?v=1784667514","url":"https:\/\/envirotechonline.com\/products\/solinst-425-discrete-interval-sampler","provider":"EnviroTech Services","version":"1.0","type":"link"}