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Item #: HW 301EM20
Our Price: $1,720.00
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Description  more details

To make a system you need at least one controller and at least 1 sensor for the gas in question. You can add up to 20 sensors to a single controller.
Note that this is a true multipoint alarm system each sensor is dedicated to a single location and continuously monitors that location independently, regardless of the status of other sensors in the group.

Introduction to the 301EM multi point gas monitoring system
Easily configured to meet ASHRAE 15, B-52 and International Mechanical Code requirements, the 301EM is commonly used to optimize gas detection in mechanical and chiller rooms. A full complement of sensors (including toxic, oxygen, combustible gases and a full line of refrigerant sensors), horns, strobes and remote panels provide added flexibility to suit a variety of gas detection system solutions.
ASHRAE No 15-2001 Mechanical Standard and
B-52 Code Compliance
The ASHRAE and B-52 security standards have been established to minimize risk and protect the safety of mechanical room personnel and the environment at large. Available in a special configuration, the 301EM mechanical room controller has been carefully designed to meet and even exceed these rigorous standards. The Vulcain 301EM can be configured to offer automatic
fan, horn and strobe activation in addition to manual fan activation. Latching relay for manual alarm recognition, silence key for manual horn deactivation, built-in 24 Vdc outputs for horn operation, and 2 breakglass switch accessories for manual alarm activation ensure optimal performance.

Features of the VA301EM gas safety monitors for Refrigerants.

  • R11, R22, R123, R125, R134a, R404A, R407C, R410A, R507A, Blends, Toxics & Combustibles
  • Operates with up to 20 remote sensors
  • Dedicated remote annunciator panel
  • RS 485 Modbus communication
  • 4 fully programmable relays
  • Three 24 VDC alarm outputs<
  • Four 4-20 mA outputs (one per sensors)
  • 2 emergency break-glass switch inputs
  • Built-in strobe & horn (105dB) available
  • Stand alone or network operation


Gases Detected Gases Detected
Accuracy is +_ 3%
Detection Range Operating Temperature Operating Humidity Range
301IRFS for Refrigerants
R11, R22, R123, R125, R134A, R404A, R407C, R410A, R507A 0-1000 ppm 0 to 40 °C (32 to 104°F) 0-95% non-condensing
Power Requirement 22-27 Vac, 29-38 Vdc, 2A max @ 29Vdc
Size 28 x 20.3 x 7 cm (11.02 x 7.99 x 2.73 in.)
Weight 1.02 kg (2.25 lb.)
Distance Between 301IRFS refrigerant sensors: Up to 200 ft. / 60.9 m
Controller and Sensor S301D2 toxic/combustible sensors: Up to 500 ft. / 152.4 m
Visual Indicators Normal Operation
Alarm Level 1
Alarm Level 2
Alarm Level 3
Signal Tx
Failure Indication
Green LED
Blinking amber LED
Yellow LED
Alarm Levels 3 with high and low setpoints  
Outputs 4 DPDT relays (alarms and/or fault), buzzer
Three 24 Vdc, 250 mA (per output)
Four 4-20 mA outputs
RFS option: 24 Vdc built-in red strobe
RFSA option: 24 Vdc built-in red strobe & 105 dBA horn
Relay Output Rating 5 A, 30 Vdc or 250 Vac (resistive load)
Ratings and Certifications Certified to CAN/CSA C22.2 No. 61010-1
Conforms to ANSI/UL 61010-1


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