Macnaught Hazard Zone Overview

Macnaught MX ExD Simple Safe Flow Meters were designed, certified and approved for most fluid Hazard Zone Atmospheres. Macnaught Hazard Meters are for clean process fluids and do not measure gases of fluids with solids. Clean Process Liquids only. The MX Hazard Meter offering provides inline .5% Volumetric Accuracy with .03% Repeatability.

• In Stock Sizes ¼” thru 4” .13 GPH to 320+ GPM
• No Flow Conditioning - put the meter where you want it
• Large in-stock inventory of Hazard Meters and Displays
• Quick response to Hazard Meter inquiries

NFPA 70 NEC Location Classes, Divisions, and Groups Class I definition: Flammable gases or vapors may be present Div 1 definition: Ignitable concentrations of hazards exist under normal operation and/or where the hazard Is caused by frequent maintenance or repair work or frequent equipment failure Div 2 definition: Ignitable concentrations of hazards exist under abnormal operation conditions Group A: Acetylene Group B: Hydrogen, Butadiene, Ethylene, Oxide, Propylene Oxide, and Acrolein Group C: Ethylene, Cyclopropane, Ethyl Ether Group D: Acetone, Ammonia, Benzene, Butane, Ethanol, Gasoline, Hexane, Methane, Methanol, Naphtha, Natural Gas, Propane, and Toluene

Hazard Zone / Class FAQ

Q: Can I use a piece of equipment approved for use in a Division 1 hazardous location in a Division 2 hazardous location? A: Yes. If equipment has been approved for use in a Division 1 hazardous location, it can be used in a Division 2 hazardous location, providing it is in the same class and group. Q: Can equipment approved for a Class I hazardous location be used in a Class II hazardous location? A: No. Equipment approved for use in Class I hazardous locations cannot be used in Class II hazardous locations. Q: Are Divisions and Zones equivalent to one another? A: When comparing Divisions and Zones, Division 2 is equivalent to Zone 2, but Division 1 is equivalent to either Zone 0 or 1

Simple Safe Quick Specs / Downloads

Macnaught MX Meters outfitted with Simple Apparatus PCB Intrinsically Safe Flow Meters and Displays meet all major Global Ex ia

The Simple Safe PCB module is designed according to IEC 60079-0:2018 and IEC 60079-11:2012. It is completely passive, adds no energy to the circuits connected, and complies with the applicable clauses for Simple Apparatus (per IEC 60079-11) when used in conjunction with the Intrinsically Safe display. Both reed switch input circuits of the MX1R-IS module, are suitable for use as simple apparatus in type of protection intrinsic safety Ex ia IIC.

Our Simple Safe Offering comes in three levels of performance:

Fx = Meter with Integral Mount Display, no outputs: No Power Required. This model is stocked in Ontario. The unit requires no Power and will show Rate and Total with a Resettable Totalizer and a Non-Resettable totalizer.

Important: Safety Barrier is provided by others

Entity Parameters to size Barrier should the Display need optional 16-30VDC Power: Uo Max 30VDC, Io Max 200mA, Po Max 1.2W

Gx = Meter with Integral Mount Display with (1) 4-20mA and (1) Pules Output – available contact Macnaught USA

Hx = Meter with Integral Mount Display for single stage batching – available contact Macnaught USA

MX Simple Safe Manual > Download PDF
MX Simple Safe Product Announcement > Page Link
MX Simple Safe Part Numbering > Download PDF

Macnaught MX ExD Quick Specifications