DCC-MRI Oxygen Sampling System

    Key Features

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    2-line by 16 character LCD display with embedded LED indicators
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    Loud side mounted buzzer
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    Blocked flow alarm
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    Sample draw pump
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    Adjustable flow meter
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    O2 sensor 0 - 25% volume range
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    One 5-amp SPDT dry contact relay
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    One configurable 4-20 mA output
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    Thermal resetting fuses
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    Standard water / dust tight, corrosion resistant enclosure (drip proof)
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    RoHS compliant circuit boards

The DCC-MRI is a self-contained Oxygen (O2) monitoring system is designed for use in rooms where compressed gases are used, such as in MRI and NMR rooms. Compressed gases and cryogenic liquids (usually nitrogen, helium and sometimes carbon dioxide) when dispensed, will displace Oxygen, creating an Oxygen deficient or hazardous atmosphere. Continuous monitoring of the Oxygen levels in these rooms is recommended to ensure the Oxygen levels remain safe and people inside the rooms are alerted in the case of a gas leak situation. In addition, the strong magnetic field inside MRI and NMR rooms can interfere with electronic equipment installed inside the room. The DCC-MRI system is designed to be installed outside the room, with sample tubing running from the monitoring system to the sampled environment. The air in the room is continuously drawn into the device by the sample draw pump, flowing over the sensor and is exhausted through the outlet port. If the Oxygen level drops below a specified set point, the DCC-MRI will go into alarm.

The DCC-MRI comes with an O2 sensor (measurement range 0 - 25% volume), 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, a side mounted audible buzzer and an LCD digital display with LED indicators for channel alarm status and fault conditions. 

This system is accurate enough to measure to government established exposure levels for O2 deficiency for health and safety.


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    Magnetic Resonance Imaging (MRI) rooms
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    Nuclear Magnetic Resonance (NMR) Spectroscopy labs
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    Transmission Electron Microscope (TEM) rooms

Gas Types

Oxygen (O2) (electrochemical) 1


Internal Sensor
Electrochemical: Oxygen (O2) 0 - 25% volume range



Water / dust tight, corrosion resistant polyester reinforced fiberglass

Copper coated interior to reduce RF interference.

Weight: 3.4 kg (7.5 lbs)
Size: 8.8” x 10.5” x 6.3” (223 mm x 267 mm x 159 mm)

Tubing: (not supplied)

1/4" OD

Factory tested distance: 50 ft (15.24 m)


Power Requirement: 24 VAC nominal, 10 W, Class 2
Current Draw: 400 mA RMS @ 24 VAC
Wiring: 24 VAC two-conductor shielded 18 awg stranded within conduit
Fuses: Automatic resetting thermal


Input / Output


Output: One configurable 4-20 mA analog output
Audible Alarm: Loud, side mounted buzzer, rated 90 dB @ 30 cm
Relay: One SPDT dry contact relay, rated 5 apms @ 240 VAC

Normal operation 1.0 LPM

Flow alarm at 0.5 LPM


User Interface

Display: 2x16 character LCD digital display with LED panel indicating CH1 state, CH2 state and FAULT
"SILENCE" Push Button Temporarily clears buzzer and latched relay


Operating Temperature: -20°C to 50°C (-4°F to 122°F)
Humidity: 15 - 90% RH non-condensing


Conforms to: CSA-C22.2 No. 205-M1983 (R2009)
                          UL508 (Edition 17):2007
Conforms to:   EMC Directive 2004/108/EC
                          EN 50270:2006, Type 1, EN61010
Conforms to:  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.

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Product Specifications

Application Brochures

MRI Room Application Brochure

Indoor Pool Application

MRI Room Oxygen Sampling System Application (DCC-MRI)



Sensor Specification

Engineering Specification Samples


Operation Manual

Part Numbers

Description Code
Internal electrochemical 3-year oxygen (O2) sensor (0 – 25% LEL range), LCD display with LED indicators, loud audible alarm, sample draw pump, flow detector with blocked flow alarm, internal adjustable flow meter, one 5A @ 240 VAC SPDT relays, one configurable 4-20 mA output, 24 VAC, water / dust tight enclosure  DCC-MRI

Calibration Kit

» Commonly used tools required for calibration in one convenient toolbox

Remote Strobe Light

» Low profile, lightweight
» Weather and corrosion resistant
» Surface mount and 1/2” NPT conduit mount

RSH-24VDC Remote Strobe & Horn Combo (with Enclosure)

» Two alarm features combined into one device
» Light weight, weather and corrosion resistant
» Independent settings for horn, strobe or horn and strobe together
» Surface mount and 1/2” NPT conduit mount
» ABS / Polycarbonate water / dust tight enclosure

Remote Audible Alarm

» Loud remote audible alarm
» Easy installation
» 2-wire VDC
» Standard corrosion resistant enclosure
» Water tight option available for wet or wash down environments

Magnetic Wand

» Used for non-intrusive calibration of the LPT-A and SCC
» Use to access menu options and initiate non-intrusive calibration for the LPT-M, LPT-P, LPT-B, DCC and CXT

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