JUMO Instrument Co. Ltd. JUMO House Temple Bank, Riverway Harlow, Essex, CM20 2DY, UK Phone: +44 1279 63 55 33 Fax: +44 1279 62 50 29 Email: [email protected] Internet: www.jumo.co.uk JUMO Process Control, Inc. 6733 Myers Road East Syracuse, NY 13057, USA Phone: +1 315 437 5866 Fax: +1 315 437 5860 Email: [email protected] Internet: www.jumousa.com JUMOGmbH&Co. KG Deliveryaddress: Mackenrodtstrafte 14 36039 Fulda, Germany Postal address: 36035 Fulda, Germany Email: [email protected] Internet: www.jumo.net Data Sheet 408304 Page 1/19 Type 408304 with thread (top), with flange (bottom) Special features • Approvals with explosion protection available • High switching voltages and switching currents • Large operating temperature range for media from -52 to +240 °C • Large pressure range of -1 to +37 bar • Up to 5 switching outputs can be freely defined as N/O contact, N/C contact, changeover contact, or bistable contact • Temperature sensor/temperature switch are available Applications • Point level measurement of liquids in storage tanks, containers, oil sumps, and tanks • Water and wastewater treatment • Mechanical and plant engineering • Shipbuilding • Energy technology • Diesel tanks Brief description The point level measurement is carried out according to Archimedes' principle for liquids. The float moves along the guide tube as the level rises or falls. The magnet in the float actuates the reed contact(s) installed in the guide tube with its magnetic field. The switching status of the reed contact can be evaluated and processed through downstream electronic components, relays, or contactors. Alarms, pumps, signal lamps, valves, and horns are typically switched via a contact protection relay. Float switches of up to 2 m in length and with up to 5 switching points are available for applications involving high filling heights. The product is installed on the side of the tank or container wall and, in the case of versions with a thread, it is fixed with a lock nut. Depending on the variant ordered, various electrical connections, process connections, guide tube lengths, floats, number and positions of contacts as well as their function (SPST-NO [N/O contact], SPST-NC [N/C contact], SPDT-CO [changeover contact], and bistable contacts) are available. With the optional temperature sensor or temperature switch, both the point level measurement and the temperature can be acquired via just one measuring point. Variants for monitoring the reed contact temperature are also available. Variants in an intrinsically safe [Ex i] design and flameproof enclosure [Ex d] are available for applications involving explosion protection. No isolating switch amplifier is required for installations with a flameproof enclosure. Customer benefits • Cost-effective installation and mounting, due to spring-cage terminals (Push-In®), for example • Reduced operating costs due to maintenance-free device design • Price-performance ratio optimized through the use of standard components • No isolating switch amplifier required for [Ex d] (flameproof enclosure) applications

JUMO Instrument Co. Ltd. JUMO House Temple Bank, Riverway Harlow, Essex, CM20 2DY, UK Phone: +44 1279 63 55 33 Fax: +44 1279 62 50 29 Email: [email protected] Internet: www.jumo.co.uk JUMO Process Control, Inc. 6733 Myers Road East Syracuse, NY 13057, USA Phone: +1 315 437 5866 Fax: +1 315 437 5860 Email: [email protected] Internet: www.jumousa.com JUMOGmbH&Co. KG Deliveryaddress: Mackenrodtstrafte 14 36039 Fulda, Germany Postal address: 36035 Fulda, Germany Email: [email protected] Internet: www.jumo.net Data Sheet 408304 Page 2/19 a Only available with guide tube diameter 12 mm.

JUMO Instrument Co. Ltd. JUMO House Temple Bank, Riverway Harlow, Essex, CM20 2DY, UK Phone: +44 1279 63 55 33 Fax: +44 1279 62 50 29 Email: [email protected] Internet: www.jumo.co.uk JUMO Process Control, Inc. 6733 Myers Road East Syracuse, NY 13057, USA Phone: +1 315 437 5866 Fax: +1 315 437 5860 Email: [email protected] Internet: www.jumousa.com JUMOGmbH&Co. KG Deliveryaddress: Mackenrodtstrafte 14 36039 Fulda, Germany Postal address: 36035 Fulda, Germany Email: [email protected] Internet: www.jumo.net Data Sheet 408304 Page 3/19 a The chemical resistance of the materials should be taken into account...

JUMO Instrument Co. Ltd. JUMO House Temple Bank, Riverway Harlow, Essex, CM20 2DY, UK Phone: +44 1279 63 55 33 Fax: +44 1279 62 50 29 Email: [email protected] Internet: www.jumo.co.uk JUMO Process Control, Inc. 6733 Myers Road East Syracuse, NY 13057, USA Phone: +1 315 437 5866 Fax: +1 315 437 5860 Email: [email protected] Internet: www.jumousa.com JUMOGmbH&Co. KG Deliveryaddress: Mackenrodtstrafte 14 36039 Fulda, Germany Postal address: 36035 Fulda, Germany Email: [email protected] Internet: www.jumo.net Data Sheet 408304 Page 4/19 a According to DIN EN 60529 b According to IEC 60068-2-6 c Observe...

JUMO Instrument Co. Ltd. JUMO House Temple Bank, Riverway Harlow, Essex, CM20 2DY, UK Phone: +44 1279 63 55 33 Fax: +44 1279 62 50 29 Email: [email protected] Internet: www.jumo.co.uk JUMO Process Control, Inc. 6733 Myers Road East Syracuse, NY 13057, USA Phone: +1 315 437 5866 Fax: +1 315 437 5860 Email: [email protected] Internet: www.jumousa.com Deliveryaddress: Mackenrodtstrafte 14 36039 Fulda, Germany Postal address: 36035 Fulda, Germany Email: [email protected] Internet: www.jumo.net Data Sheet 408304 Page 5/19 Small and large connection housing, extension tube lengths in mm (1) Maximum ambient...

JUMO Instrument Co. Ltd. JUMO House Temple Bank, Riverway Harlow, Essex, CM20 2DY, UK Phone: +44 1279 63 55 33 Fax: +44 1279 62 50 29 Email: [email protected] Internet: www.jumo.co.uk JUMO Process Control, Inc. 6733 Myers Road East Syracuse, NY 13057, USA Phone: +1 315 437 5866 Fax: +1 315 437 5860 Email: [email protected] Internet: www.jumousa.com JUMOGmbH&Co. KG Deliveryaddress: Mackenrodtstrafte 14 36039 Fulda, Germany Postal address: 36035 Fulda, Germany Email: [email protected] Internet: www.jumo.net Data Sheet 408304 Page 6/19 Connection housing Ex d, extension tube lengths in mm (2) (1) Maximum...