MARL’s 677 Series: More than just an indicator

Used in some of the world’s harshest conditions, the robust and reliable 677 Series is one of MARL’s best-selling panel indicators.

An indicator has just one job: to indicate something to the user.  It sounds like a very simple task, but to do so clearly and reliably while faced with vibration, harsh weather, vandalism, direct sunlight and other environmental challenges requires more than just an indicator.

That’s why the 677 Series is trusted around the world in critical applications where failure to convey an indication is not an option, such as jet fighters, Formula One racing cars, theme park rides and power stations: it’s not just an indicator.  It’s a design informed by almost 50 years of MARL’s expertise; it’s a high intensity LED for sunlight readability; it has a good on/off contrast ratio and a wide viewing angle; it’s internally potted for shock and vibration resistance; it’s vandal resistant; it’s sealed to IP67 for weatherproofing; it’s long lasting and it has outstanding reliability.