DCC-SD Sample Draw System

For monitoring: Ammonia, Carbon monoxide, Ethylene, Ethylene oxide, Formaldehyde, Hydrogen, Hydrogen fluoride, 
Hydrogen sulphide, Nitric oxide, Sulphur dioxide, Refrigerants, TVOCs

Self-contained, single sensor sample draw gas detection system that draws sample air from locations where it is 
difficult to install a gas detector

Key Features

• Single sensor
• 2x16 character LCD display with LED indicators
• One 5A SPDT dry contact relay
• One configurable 4- 20 mA output
• Sample draw pump
• Adjustable flow meter
• Blocked flow alarm
• Standard water / dust tight, corrosion resistant enclosure (drip proof)

The DCC-SD is a self-contained, single sensor, sample draw monitoring system that is designed to draw samples of 
air from hard to access locations such as shafts, tall ceilings, wells, pits, small rooms and many other locations 
where it is difficult to install gas detectors. The DCC-SD provides continuous sampling of target air over long periods 
of time.

The DCC-SD system is designed to be installed outside the target location, at a viewable height, with sample tubing 
running from the monitoring system to the sampled environment. The sample draw pump pulls air from the area 
through the tubing, in through the inlet port and over the sensor. The air is then exhausted through the outlet port. 
If the gas readings are higher than a specified set point, the DCC-SD will go into alarm.

The DCC-SD can be configured with a toxic, combustible or refrigerant sensor and comes with a flow detector, a 
sample draw pump and an internal adjustable flow meter. Features include one configurable 4 - 20 mA output, one 
alarm level line voltage relay with field configurable time delays and trigger levels, a blocked flow alarm indicating a 
dirty filter or clogged tubing and an LCD display with LED indicators for channel alarm status and fault conditions.

The filter should be replaced with it becomes dirty and the tubing should be checked regularly to ensure it remains 
unblocked. The device has been factory tested with a maximum of 15.24 m / 50 ft of sample tubing. For the best 
response, the sample tubing between the sample point and the inlet port should be kept as short as possible.

Caution: The DCC-SD sample draw system should not be used inside classified hazardous areas or to sample draw 
combustible gases because the pump is not intrinsically safe. 

Target Gas

Gas Sensors					                Ammonia (NH3), Carbon Monoxide (CO), Ethylene (C2H4), Ethylene 
                                                                Oxide (C2H4O), Formaldehyde (CH2O), Hydrogen (H2), Hydrogen 
                                                                Fluoride (HF), Hydrogen Sulphide (H2S), Nitric Oxide (NO), Oxygen 
                                                                (O2), Sulphur Dioxide, (SO2), R22, R134A, R402A, R404A, R407C, 
                                                                R410A, R422D, R438A, R507A, TVOCs

Mechanical

Enclosure						        Water /dust tight corrosion resistant polyester reinforced fiberglass

Weight						        3.4 kg / 7.5 lbs

Size						                223 x 267 x 159 mm / 8.8 x 10.5 x 6.3 inches

Tygon Polymer Tubing (sold separately)		1/8" ID x 1/4" OD, clear, 15.24 m / 50 ft roll sold separately 
                                                                (p/n: CET-8000-CMT)

Teflon Lined Tubing (sold separately)			For use with DCC-SD-NH3, special non-absorbent, 13/16" 
                                                                ID x 5/16" OD, clear, 15.24 m / 50 ft roll sold separately 
                                                                (p/n: CET-8000-CTRL)

User Interface

Display						        2x16 character LCD display 
						                LED indicators for "CH1" state, "CH2" state and "FAULT"

SILENCE Push Button				        Temporarily clears buzzer / latched relays

Input/Output

Output						        One 4-20 mA analog

Relay						                One SPDT dry contact relay rated 5 amps @ 240 VAC

Blocked Flow Alarm					Side mounted buzzer, rated 90 dB @ 30 cm / 1 ft

Flow						                Normal operation: 1.0 LPM 
						                Flow alarm: less than 0.5 LPM

Electrical

Power Requirement					24 VAC nominal, 10 W, Class 2

Current Draw					        400 mA RMS @ 24 VAC

Wiring						        24 VAC 2-conductor shielded minimum 18 AWG stranded within 
                                                                conduit

Fuses						                Thermal, resetting

Environmental

Operating Temperature				        -20°C to 40°C (-4°F to 104°F)

Operating Humidity					15 - 90% RH non-condensing

Location						        Indoor use only. Not for use in classified hazardous areas or to 
                                                                sample draw combustible gases.

Certifications

Conforms to					                CSA-C22.2 No. 205-12, UL508 (Edition 17):2007 
						                EMC Directive 2004/108/EC, EN 50270:2006, Type 1, EN61010 
						                FCC. This device complies with part 15 of the FCC Rules. Operation 
                                                                is subject to the following two conditions: (1) This device may not 
                                                                cause harmful interference, and (2) this device must accept any 
                                                                interference received, including interference that may cause 
                                                                undesired operation. 
						                RoHS compliant circuit boards