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...

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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.

Specifications

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

Technical Library

CXT Operation Manual

CXT Datasheet

All documents for this product