Det-Tronics xWatch Explosion-Proof Camera with X-Series Flame Detectors User Manual

Addendum xwatch

background image







Explosion-Proof Camera

with X-Series Flame Detectors


The xWatch


Explosion-Proof Camera is available as a

factory installed option with any of the Det-Tronics X-Series

line of flame detectors. With this arrangement, the camera

and detector share the same field of view. This option is

available with X3301 and X3302 Multispectrum IR, X5200

UVIR, X2200 UV and X9800 IR Detectors.

The xWatch Surveillance Camera produces a high

resolution color video picture using a camera module

that is mounted inside an explosion-proof NEMA 4X rated

housing. The device’s explosion-proof rating makes it

suitable for Class I, Div. 1, Groups B, C and D locations.

In the event of a fire or gas alarm, the operator can

immediately view the monitored area to determine whether

personnel are present and safe. An accurate evaluation

of the hazard’s size, nature, location and severity can be

determined quickly and safely.

The use of a digital video recorder (DVR) to capture the

event provides a permanent record for future analysis of

what occurred.



The xWatch has a balanced differential video output for

driving a long distance twisted pair signal to a remote

site for monitoring and/or recording. The video output

format can be either NTSC (National Television Systems

Committee) or PAL (Phase Alternating Line).

The xWatch video driver is designed for use with twisted

pair cable of 100 ohm impedance. The best video

performance in terms of distance, video quality, and cost

is attained using 22 AWG to 16 AWG, twisted pair cable

of 100 ohm impedance. The monitor end must terminate

the video cable with 100 ohms. Since most monitors

have a built-in termination resistor of 75 ohms instead

of 100 ohms, a balun or other matching network (video

converter) must be used.

A variety of matrix control systems or DVRs can be suitable

for viewing or recording the video signal, depending

on the requirements of the individual application. The

detector’s auxiliary relay contacts are typically used to

signal the video system of an alarm event.

Refer to Figure 1 for a schematic of a typical system.


Detector Electronics Corporation 2009

Rev: 5/09