CXT Explosion Proof Transmitter

For monitoring: Ammonia, Carbon monoxide, Nitrogen dioxide, Oxygen, Hydrogen sulphide, Sulfur dioxide, Methane, Propane, Hydrogen, Butane, Ethanol, Hexane, Toluene, Pentane, Ethylene

Reliable, accurate monitoring of toxic or combustible gases in potentially explosive and harsh environments, including hazardous-rated areas.

Applications

  • Industrial / Commercial Buildings
  • Onshore Oil & Gas Terminals
  • Utilities
  • Power Plants
  • Refineries
  • Chemical Plants
  • Deep Freezer Rooms
  • Chiller Rooms
  • and many more...

Key Features

  • Single channel, internal or remote sensor
  • 4 - 20 mA analog or Modbus® digital outputs
  • Three 5A relays (digital model only)
  • Large graphic LCD display for real time monitoring
  • Menu driven magnetic keypad for user configurations
  • Displays values in bar graphs or 30 minute onboard data trends
  • Security menu with authorization code access to lock critical parameters
  • Rugged construction to withstand impact damage
  • Optional heated sensors and electronics for low temperature operation

Description

The CXT Explosion Proof transmitter delivers reliable, accurate monitoring of toxic or combustible gases in potentially explosive and harsh environments, including hazardous-rated areas. The explosion proof housing is a rugged design that offers greater protection from being damaged by impact type incidents. The Arctic smart sensor package adds programmable heaters for both the sensor (1-watt) and electronics (4-watt) which are automatically activated when temperatures drop below a user selectable level.

The large LCD display shows gas concentrations and engineering units as well as historical data for the last 30 minutes. Navigation through the menu is driven by a magnetic keypad and the user can change alarm set points, instrument configurations and enter into maintenance mode for non-intrusive calibration without opening the enclosure.

Accompanying the LCD display are standard LED alarm indicators that show when low and high alarm conditions are met. The digital model comes with Modbus® RTU output and three 5A relays that can be used to drive audible/visual alarms, or activate exhaust fans. The CXT’s security menu allows entry of an authorization code to lock critical parameters.

Target Gas
Electrochemical Sensors (internal)
Ammonia (NH3), Carbon monoxide (CO), Hydrogen (H2), Hydrogen sulphide (H2S), Nitrogen dioxide (NO2), Oxygen (O2), Sulphur dioxide (SO2)
Infrared Sensors (internal)
Carbon dioxide (CO2), Butane (C4H10), Ethanol (C2H6O), Hexane (C6H14), Toluene (C7H8), Methane (CH4), Propane (C3H8)
Catalytic Sensors (internal or remote)
Butane (C4H10), Ethylene (C2H4), Hydrogen (H2), Methane (CH4), Propane (C3H8), Pentane (C5H12)
Mechanical
Enclosure
Durable cast aluminum suitable for Class 1, Division 1 & 2, Groups A, B, C, D
Weight
2.18 kg / 4.8 lbs
Size
203 x 140 x 117 mm / 8.0 x 5.5 x 4.6 inches
User Interface
Display
Backlit LCD graphic display for gas readings, 64 x 128 pixels
30 minute trend bar graphing
Front Panel
Five indicator lights: AL1, AL2, Fail, In Cal and RS-485
Security Mode
Locks out critical parameters
Memory
Non-volatile E2 memory retains configuration values on power outages
Calibration
Non-intrusive calibration
Input/Output
Output
3-wire, 4-20 mA. Max loop resistance is 750 ohms (@ 24 VDC)
Communication
Analog 4-20 mA or Modbus® RS-485 RTU
Relay
Digital models only: Three SPDT dry contact relays, rated 5 amps @ 30 VDC or 240 VAC resistive
Electrical
Power Requirement
10 - 30 VDC, 250 mA @ 24 VDC
Power Consumption
With a typical 0.5 watt Bridge Sensor: 100 mA @ nominal 24 VDC
Relays / RS485 Modbus Option Board: 40 mA per relay (120 mA total with all 3 energized); RS485 use adds 20 mA
Loop Resistance
750 ohms maximum (at nominal 24 VDC power)
Wiring
Digital: 4-conductor, 16 AWG stranded, shielded network wiring (daisy-chain)
Analog: 3-conductor, 18 AWG stranded, shielded
Environmental
Operating Temperature
-40°C to 60°C (-40°F to 140°F)
Arctic heater smart sensors operate down to -55°C (-67°F)
Operating Humidity
5 - 90% RH non-condensing
Certifications
Conforms to
NRTL CSA Approvals (File # 219995): Class 1, Division 1 & 2, Groups A, B, C, D.
Suitable for explosion proof and intrinsically safe installatations. Housing
enclosure suitable for Class 1, Division 1 & 2, Groups A, B, C, D.

Models with electrochemical sensor types NH3 and NO2 are Division 2 and come with a splash guard. All other models are Division 1.
Designed to meet CSA C22.2 No.152 for Combustibles Monitors and ISA 92.0.01 Part 1 for Toxic Monitors (excludes ammonia). Ammonia is for use in non-classified areas only
RoHS compliant circuit boards
Product Codes
CXT-A-NH3-S
Electrochemical ammonia (NH3) sensor (0 - 500 ppm range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 2 / Gr. A, B, C, D enclosure, comes with splash guard
CXT-A-CO
Electrochemical carbon monoxide (CO) sensor (0 - 1,000 ppm range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-H2
Electrochemical hydrogen (H2) sensor (0 - 2,000 ppm range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-H2S
Electrochemical hydrogen sulphide (H2S) sensor (0 - 500 ppm range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-NO2-S
Electrochemical nitrogen dioxide (NO2) sensor (0 - 100 ppm range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 2 / Gr. A, B, C, D enclosure, comes with splash guard
CXT-A-O2
Electrochemical oxygen (O2) sensor (0 - 25% volume range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-SO2
Electrochemical sulphur dioxide (SO2) sensor (0 - 100 ppm range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-IC2H6O
Infrared ethanol (C2H6O) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-ICO2
Infrared carbon dioxide (CO2) sensor (0 - 5% volume range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-IC4H10
Infrared butane (C4H10) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-IC6H14
Infrared hexane (C6H14) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-ICH4
Infrared methane (CH4) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-IC3H8
Infrared propane (C3H8) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-IC7H8
Infrared toluene (C7H8) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-CC2H4
Catalytic ethylene (C2H4) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-CC3H8
Catalytic propane (C3H8) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-CH2
Catalytic hydrogen (H2) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-CCH4
Catalytic methane (CH4) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-CC4H10
Catalytic butane (C4H10) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-A-CC5H12
Catalytic pentane (C5H12) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, 4 - 20 mA analog output, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-NH3-S
Electrochemical ammonia (NH3) sensor (0 - 500 ppm range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 2 / Gr. A, B, C, D enclosure, comes with splash guard 
CXT-D-CO
Electrochemical carbon monoxide (CO) sensor (0 - 1,000 ppm range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-H2
Electrochemical hydrogen (H2) sensor (0 - 2,000 ppm range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-H2S
Electrochemical hydrogen sulphide (H2S) sensor (0 - 500 ppm range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-NO2-S
Electrochemical nitrogen dioxide (NO2) sensor (0 - 100 ppm range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-O2
Electrochemical oxygen (O2) sensor (0 - 25% volume range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-SO2
Electrochemical sulphur dioxide (SO2) sensor (0 - 100 ppm range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-ICO2
Infrared carbon dioxide (CO2) sensor (0 - 5% volume range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-IC4H10
Infrared butane (C4H10) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-IC2H6O
Infrared ethanol (C2H6O) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-IC6H14
Infrared hexane (C6H14) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-ICH4
Infrared methane (CH4) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-IC3H8
Infrared propane (C3H8) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-IC7H8
Infrared toluene (C7H8) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-CC2H4
Catalytic ethylene (C2H4) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-CC4H10
Catalytic butane (C4H10) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-CC3H8
Catalytic propane (C3H8) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-CH2
Catalytic hydrogen (H2) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-CCH4
Catalytic methane (CH4) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
CXT-D-CC5H12
Catalytic pentane (C5H12) sensor (0 - 100% LEL range), LCD display, LED indicator, three-wire power, Modbus® digital output, three 5A @ 30 VDC or 240 VAC SPDT relays, 10 - 30 VDC, aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure 
Factory Options
-S
Splash guard to protect sensor (p/n: CXP-SPG)
Remote Sensors
CXT-A-R-CH2
CXT analog transmitter with remote catalytic Hydrogen (H2) sensor (0 -100% LEL range), comes with gas flow adapter, 6.35 mm (1/4 in) ID tubing required (not supplied), aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure
CXT-A-R-CCH4
CXT analog transmitter with remote catalytic Methane (CH4) sensor (0 -100% LEL range), comes with gas flow adapter, 6.35 mm (1/4 in) ID tubing required (not supplied), aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure
CXT-D-R-CH2
CXT digital transmitter with remote catalytic Hydrogen (H2) sensor (0 -100% LEL range), comes with gas flow adapter and three 5A relays, 6.35 mm (1/4 in) ID tubing required (not supplied), aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure
CXT-D-R-CCH4
CXT digital transmitter with remote catalytic Methane (CH4) sensor (0 -100% LEL range), comes with gas flow adapter and three 5A relays, 6.35 mm (1/4 in) ID tubing required (not supplied), aluminum Class 1 / Div 1 / Gr. A, B, C, D enclosure

Options, Accessories and More...