Vaihinger was established in 1884. 
We continue to specialise in liquid level indication techniques today. We design and produce advanced, high quality, instruments for measurement and control. We give priority to original and technologically sound solutions and to production quality. We adopt advanced liquid level indication techniques to ensure maximum process plant and operator safety.
Liquid level indication technology is essential in the chemical industries, oil refineries, power generating plant, for the protection of steam generating plant, for marine boiler installations, and environmental protection. 
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MAGNETIC LEVEL INDICATORS |
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MAGNA-VOX SERIES LIQUID LEVEL INDICATORS |
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Supplied for a wide range of operating pressures (vacuum to 325 bar) and an operating temperature range of -200°C to +450°C the MAGNA-VOX magnetic liquid level indicators provide accurate level measurement for remote indication and switching.
A permanent ring magnet, mounted within the float, actuates a series of red and white indication elements, through the wall of the guide tube. Magnetic stabilisation of each indication element ensures both reliable and consistent liquid level indication in the presence of vibration and other physical disturbances or shock. For the majority of all applications a freely moving closed float is used. |
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Through special design and manufacture the minimum liquid density for closed floats can be as low as 300 kg/m3, for pressure up to a maximum of PN40. The standard float guide tube material is ANSI 316 stainless steel (1.4571). Alternative materials comprise: hastelloy, titanium, and monel, PVDF, PE, PP, PVC etc. Standard indicators can be coated with halar (E-CTFE), rubber and teflon (PTFE).
The design and production of magnetic level gauges complies with AD/TRD regulations [German design classification]. PTB certificates are supplied with gauges intended for installation in hazardous areas. Gauges intended for marine applications are supplied with Germanischer Lloyd, Llyod's Register of Shipping and Det Norke Veritas certificates, in addition to those of several other international authorities.
For operating pressures between PN40 and PN63 TÜV certificates can be provided for those steam boiler level gauges used as regulators and limiters. |
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The following options are readily available and can be provided according to the application: |
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drain and vent valves |
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float guide tube heating (steam, thermal oil,electric tape) |
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plexitherm element for insulated vessels or tanks, for example, those containing refrigerants |
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calibrated scale for indication rail |
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remote level indication with detecting element and resistance to current converter (steps of 7,5, 15 or 30 mm, output 4 to 20 mA)
Ex-i operating possible |
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adjustable magnetic switches mounted on the float guide tube for variable switching points. Switch types: toggle, reed, and proximity for intrinsically safe applications (type 75/51) |
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analogus LED display |
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LIQUID LEVEL LIMITED SWITCHES |
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LIQUID LEVEL LIMIT SWITCHES PN 25 [25 bar] |
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for protection against dry-running of pumps, flameproof model certified for hazardous area installation |
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float in zone 0 |
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function can be checked when installed |
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magnetic switch attachment above the product level (option) |
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several materials available |
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Liquid Level Limited Switch.pdf |
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LIQUID LEVEL LIMIT SWITCH NIVO VOX PN 40 [40 bar] |
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max. 4 switching points
flameproof model
certified for hazardous area installations |
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float in zone 0 |
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maximum switching depth 5000 mm |
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several materials available |
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NIVOTROL LEVEL PROBE PN40 [40 bar] |
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quasi-continuos liquid level
measurement flameproof model
suitable for hazardous area installation |
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LIQUID LEVEL SWITCH LIQUI VOX up to PN320 [320 bar] |
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switching at maximum and minimum level |
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horizontal installation in pressure vessel |
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magnetic actuation of switches through metal diaphragm |
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several materials available |
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GLASS TUBE LEVEL GAUGES up to PN 25 [25 bar] |
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liquid level, clearly visible from all sides |
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with flanged or threaded connection in various materials |
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with several glass tube diameters |
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with glass protection devices |
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with automatically closing ball valve (optional)
(automatic closing if glass breaks) |
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with coloured float |
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glas tube level gauges.pdf |
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REFLECTION LEVEL GAUGES up to PN40 and PN 63 [40 & 63 bar] |
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direct indication of water level with clearly distinctive light and dark areas |
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with borosilicate reflection glass |
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glass sizes according to DIN dimensions, largest possible sight length |
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with single or double shut-off valves |
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with automatically closing ball valve (optional) |
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with several sight glasses for longer centre-to-centre distances |
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option: material 1.4571 with contact to the liquid |
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reflection water level gauges.pdf |
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TRANSPARENT LIQUID LEVEL GAUGE up to PN 250 [250 bar] |
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direct reading of liquid level
clear visibility with optimal illumination device (flameproof version available) |
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borosilicate glass with mica protection or mica packages |
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double closing shut-off valves and automatically closing ball valve |
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maximum sight lenght with specified centre-to-centre distance |
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special design for TV transmission to control room |
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made in stainless steel (option) |
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liquid level gauge.pdf
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