A device that meets all requirements
Globally approved for hazardous areas
H250 M40 from KROHNE offers a universal Ex-design across a wide range of usage zones and protection types.
All electronic components are designed intrinsically safe and non-sparking and can be used in areas that are explosive due to the presence of gas or dust. As an option, the same components, featuring a safety housing, can be installed as explosion proof devices. One device can thus accommodate the different regional explosion protection strategies.
H250 M40 is ATEX-, IECEx- and FM-approved for the USA and Canada and also according to NEPSI for China. In addition, the measuring device also features other local approvals such as INMETRO, CCOE/PESO, KGS and EAC.
Whether it‘s intrinsically safe or explosion proof – the devices are designed as IP66/IP68 or NEMA 4X/6 as standard. An IP69K version is also available on request.
Special indicator variants for extreme operating conditions
With the indicator housing made of stainless steel, the H250 M40R withstands attacks from salt fogs and contaminated precipitates. It can be reliably used in corrosive atmospheres and is perfectly suited for use in spray water zones, such as in the food and beverage industries as it features ingress protection type IP69K.
Unique to date: The indestructible stainless steel housing is also available on request in an explosion proof version for use in hazardous areas.
As a high-temperature variant, the H250 M40 HT measuring device is suitable both for very high product temperatures up to +400 °C / +752 °F as well as cryogenic applications down to -200 °C / -328 °F. The increased distance between the measuring tube and the display makes it easier to insulate the measuring tube.
Robust design for harsh process conditions
The measuring principle allows for a robust, closed tube design without sensor feedthrough, as the height of the float is transferred to the indicator by way of a magnetic coupling. This enables high pressure versions that can withstand up to 900 barg / 13,000 psig.
All wetted, pressurised parts are made as standard of 1.4404/316L and 1.4401/316 dual certified stainless steel and meet the requirements of the NACE MR0175/MR 0103 standard. To guarantee the longevity of the device even with chemically harsh products, it is possible to use special materials such as Hastelloy®, titanium, Monel®, 6Mo, Inconel®, etc. in production. In addition, the H250C M40R is also available with a PTFE liner for applications involving aggressive acids and bases.
Hygienic design for use in the food and pharma industries
The H250F M40 is a variable area flowmeter with hygienic design for food and pharmaceutical applications. FDA, EC1935 and GB4806 compliant materials meet strict hygienic and legal regulations. A design with no dead spaces or stagnation zones as well as pickled and optional electropolished surfaces with a surface roughness Ra < 0.8 μm make it difficult for deposits to settle and facilitate proper cleaning.
Expanded measuring range for more process information
Depending on the technology, the standard measuring range span of the H250 M40 is 10:1. As an option, it is possible to refine the measuring range span – and this is worldwide unique for measuring devices in this category – to 100:1. This way the otherwise necessary additional measuring devices for small quantities are no longer necessary.