Reed switch level sensor PMP-152 with «dry» contacts
Application
Designed to control availability of liquid media, including explosive ones, on predefined levels (max. four) during process operations.
Applied within modern systems for commercial accounting of petroleum products, APCS, DCS, ESDS systems at sites of chemical, petrochemical, pharmaceutical and food industries, in machine engineering and shipbuilding industries.
Installed on stationary and mobile tanks operated under pressure up to 10 MPa.
May be operated in zones with seismic activity and Far North regions.
Features
- modification for operation with ambient temperature from -60 °C
- explosion protection marking Ga/Gb Ex db IIB T3
- anti-vandal housing made of aluminum alloy or stainless steel
- various types of signal outputs
- explosion-proof modification
- inverted modification for installation at tank bottom
- easy operation and commissioning
- transport modification for mobile tanks including naval and riverine vessels
- chemical-proof modification for liquids with high chemical activity
- various types of mounting devices for protective cable sheath (metal hose conduit, armored cable, pipe)
Description
Housing is manufactured of powder-coated aluminum alloy AlSi7 (analogue of AlSi7Mg) with oxide fluoride electro conductive coating (case can be manufactured of corrosion-resistant steel 12Cr18Ni9Ti (cast housing), 12Cr18N10Ti (welded housing)). External and internal grounding clamps, single or two cable fittings. Various types of mounting devices for protective cable sheaths can be supplied on order. Electronic board with terminals for connection is enclosed within, they can be accessed through the removable cover.
Mounting is manufactured in accordance with Customer’s’s request.
Reed-switch contacts are installed inside the guide pipe made of corrosion-resistant steel 12Cr18Ni10Ti; position of reeds may be altered during operation without tank depressurization. Floats (max. four) travel along the guide pipe within the confined range.
Liquid level is controlled by means of the float with built-in magnet, creating magnetic field impacting the reed switches, connecting the output circuits when the control medium level is reached.