Intrinsically Safe Drum Alarm

The Intrinsically Safe high level drum alarm responds to a high or low level condition, with a loud buzzer and flashing LED.  The buzzer is loud at 98dB measured at two feet, and since it has a unique warbling sound, it cuts through factory noise so it will be heard. The unit is rated for Class 1, Division I Hazardous Locations and, because it is battery powered, it can be placed in service instantly.

Easy to Install. Different drum mountings are all adjustable by hand. Simply loosen the nut or thumbscrew, and slide the alarm to the depth you want. Alternatively, we offer many choices of other drum mounts if preferred.

CONSTRUCTION

316 stainless steel wetted parts and drum mount.  The electronics enclosure is  aluminum with olycarbonate LED lens and metal pushbutton. The float switch is protected inside a sturdy guard so it can be moved from drum-to-drum without worrying about damage.  The enclosure is waterproof and rated IP65.

BATTERY POWER

Battery Power is uninterruptible and allows installation anywhere. No outlets, electricians, or inspectors needed. The batteries are designed to last for years. This is possible because we start with a lithium  battery that has a shelf life of 20 years. Also, the battery capacity is a remarkable 2400 mA-hr.  This, combined with firmware that puts them into a low output mode after 1 hour, allows these to sound for almost a month straight if unattended!   Of course this will never happen but its nice to know they can.  Furthermore, when the batteries do run low, a low-battery signal is given, which is different from the level alarm signal to make it easy to identify. Finally, the battery is easily replaceable in the hazardous location.

OPERATION

Different behaviors are field-selectable using DIP switches on the circuit board. For use on drums, the most popular would be the ability to enable or disable the 30-minute snooze alarm. If enabled, the LED continues to flash after the buzzer is silenced.  After 30 minutes, the buzzer will sound again until the level is corrected.  In addtion there are other behaviors available that are mostly related to the relay output.  More details on these are in the documents section below.

MODELS

Models with an alarm only (no liquid feed pipe) mount in the 3/4″ drum bung.  They are available for high liquid level (IS-DHK-SS) and also for low. (IS-DLK-SS)

Models with a liquid feed pipe have two pipes and require mounting in the 2″ drum bung using our “tall” drum plug.  Please contact sales for more information on these.

We also have models for low level. Please inquire!