{"title":"Flow indicators","description":"\u003cp\u003eFlow indicators show through a window whether water or a water-based liquid is flowing in the line, without a power supply. An impeller turns behind the window, so a stopped flow is easy to see; they give no measured value in l\/min. Brass indicators have a Pyrex glass window and suit water and mild water-based liquids up to +90 °C (≈194 °F). Sizes up to G 1\" are rated to 25 bar (≈360 psi), G 1 1\/4\" and G 1 1\/2\" to 15 bar (≈220 psi). They work in any mounting position and flow direction, and the impeller speed gives a rough idea of the flow.\u003c\/p\u003e\u003cp\u003eThe polycarbonate version suits water up to 1 bar (≈15 psi) and +55 °C (≈131 °F). It only shows flow or no flow, also at very low flow. Its built-in filter is cleaned by back-flushing, and the flow runs in one direction only.\u003c\/p\u003e\u003cp\u003eFlow indicators are made only for water and non-aggressive water-based liquids. For oil, or for a value in l\/min, choose a variable area flow meter; for an electrical signal, choose a flow switch. Replacement sight glasses for the brass indicators are listed under flow accessories.\u003c\/p\u003e","products":[],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0572\/1787\/6152\/collections\/00.jpg?v=1793066561","url":"https:\/\/tameson.es\/collections\/flow-indicators.oembed","provider":"Tameson.com","version":"1.0","type":"link"}