Single Channel Controller 4001/4011
Sierra Monitor’s 4001/4011 controllers are single channel gas detection controllers that can be used with most industry standard two- or three-wire 4-20 mA or other standard voltage/current sensor transmitters. Both controllers provide the user with concentration displays, two independent adjustable alarm levels, and a fault relay.
The 4001 controller is housed in a NEMA 4X wall mount enclosure, with the option of a NEMA 7 explosion proof enclosure. The 4001 comes with an integral battery charger that can provide a trickle charge to an optional battery to provide reliable, continuous service. The LCD display on the controller shows the gas concentration or alarm setpoints.
The 4011 controller is in a 1/8 DIN panel mount enclosure. The front panel includes a 3 ½ digit LCD display, LEDS indicating three alarms, reset push button, and LEDs indicating the display selection.