Flow Monitor & Flow Indicator DKM/A-1

Product catalog summary

Operation and Application
The DKM/A-1 operates on a float measuring principle and is applicable in mechanical engineering, central lubrication, circulation lubrication, and transformers. It features universal orientation, high reliability, high switch accuracy, viscosity compensation, and adjustable switch points. It is available in EX-version according to ATEX directive and UL Recognized version, with high pressure resistance and threaded connections.

Materials
The device is available in brass and stainless steel versions. Wetted parts include springs made of 1.4571, FKM gaskets (optional NBR, EPDM), hard ferrite magnets, and device bodies made of brass or 1.4571. Non-wetted parts include displays made of Makrolon® and nickel-plated brass.

Measuring Ranges
The switch range for oil with a density of 0.9 kg/dm³ varies from 0.5 to 110 l/min, depending on the model. The maximum operating pressure is 250 bar for brass and 300 bar for stainless steel versions. The pressure drop ranges from 0.02 to 0.4 bar, with a viscosity range of 30 cSt to 600 cSt and a maximum temperature of 120 °C (optional 160 °C). Measuring accuracy is ±10% of full scale.

Operating Data
For explosion-proof designs according to ATEX, and UL Recognized devices, specific operating instructions must be followed. Deviations in installation positions or operating conditions can increase measurement errors.

Technical Drawing and Summary of Types
Overall dimensions and weights vary by type, with detailed specifications provided for each model.

Electrical Data
The device offers ingress protection of IP65 or IP67, with potential-free reed contacts that do not require a power supply. Various connector types and cable lengths are available upon request. The device complies with ATEX and UL standards, with specific electrical ratings for change over and normally open contacts.

Electrical Connection
Connections comply with EN 175301-803, Form A, and include options for connectors and cables, with specific provisions for EX-version and UL Recognized switch contacts.

Catalog excerpts

Flow Monitor & Flow Indicator OVERVIEW Operation Features - Float measuring principle - Universal orientation - High reliability Application - High switch accuracy - Viscosity compensated - Mechanical engineering - Infinitely variable switch point adjustment by operator - Central lubrication - EX-version according to ATEX directive available - Circulation lubrication - UL Recognized version available - Transformers - High pressure resistance - Threaded connection, special thread on request Installation information - The operating instructions for DKM/A-1 Module BASICS / ...ATEX must be observed! - Download: www.meister-flow.com

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250 bar (Brass version) Operating pressure, max. - 300 bar (Stainless steel version) Pressure drop 0,02 - 0,4 bar Measuring accuracy ±10 % of full scale Changed operating data apply to the device in explosion-proof design according to ATEX directive. Refer to the Operating Instructions for DKM/A-1 Module ATEX. For UL Recognized devices, changed operating data apply. Refer to the Operating Instructions for DKM/A-1 Module BASICS Download: www.meister-flow.com MEASURING RANGES Type Switch range for Oil, density 0,9 kg/dm3 (1) l/min gph gpm (1) The specified measuring- /switch ranges...

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SUMMARY OF TYPES Type Overall dimensions [mm]

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EX-version in compliance with ATEX directive ATEX II 2 G Ex mb II T6 & ATEX II 2 D Ex tD A21 IP67 T80 °C ATEX II 2 G Ex mb II T5 & ATEX II 2 D Ex tD A21 IP67 T100 °C Change over 250V • 1A • 30VA (3) UL Recognized switch contacts Change over 240V • 1,5A • 50VA (3) Normally open 250V • 3A • 100VA (3) Minimum load 3VA - Connector in compliance with EN 175301-803, Form A (DIN 43650, Form A) - Connector M12x1 - Cable (1 m) EX-version in compliance with ATEX directive - Cable (2 m) UL Recognized switch contacts - Connector in compliance with EN 175301-803, Form A - Cable (1 m) Ingress Protection...

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