T3A Gas Detector

3-Wire Explosion Proof Transmitter

Features

  • Electrochemical, Infrared or catalytic bead sensors

  • Wire powered (3-Wire), 12 to 35 VDC operating voltage

  • Operating temperature range -40°C to +60°C

  • LCD display with LED back-light

  • 3 Push-button interface (ADD, MENU, SUB)

  • Non-intrusive buttons using magnetic wand

  • 2 Individually configurable alarms

  • 2 Front panel LED indicators (amber and red)

  • 2 Optional fully programmable alarm relays (dry contacts)

  • Output options: 4-20mA (3-wire) analog, RS-485 Modbus, both standard Industry Applications

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Description

The T3A Series Gas Detector ambient air hazardous gas detector is a versatile assembly  that uses an electrochemical, infrared, catalytic bead sensor element to detect a variety of gases. Wired power (12 to 35 VDC) with 4-20 mA analog and RS-485 Modbus outputs standard. Magnetic switches allow for non-intrusive calibration while in the field as well as full system settings and diagnostics.

The T3A represents the latest leading edge technology in fixed gas detection today.

Related Services

Fixed Systems ServicesFixed Systems Turnkey Solutions

  • Design, Consultations, and Engineering
  • Installation
  • Start-up
  • Training
  • System Maintenance

 

Applications

  • Petrochemical plants
  • Refineries
  • Water & wastewater treatment plants
  • Pulp & paper mills
  • Manufacturing facilities
  • Chemical plants

Sensor Options

Gas Type Range T90 Hazard Classification
LEL Catalytic 0 – 100% (0-5% Vol.) < 90 sec. Class 1, Div 1
CL2 0 – 10 ppm < 60 sec. Class 1, Div 2
CLO2 0 – 1 ppm < 120 sec. Class 1, Div 2
CO 0 – 300 ppm < 30 sec. Class 1, Div 1
CO2 0 – 5% vol. < 30 sec. Class 1, Div 1
H2S 0 – 100 ppm < 30 sec. Class 1, Div 1
H2S 2K 0 – 2000 ppm < 25 sec. Class 1, Div 1
HCL 0 – 30 ppm < 300 sec. Class 1, Div 2
HCN 0 – 30 ppm < 70 sec. Class 1, Div 2
HF 0 – 10 ppm < 90 sec. Class 1, Div 2
LEL-IR 0 – 100% (0-5% Vol.) < 30 sec. Class 1, Div 1
LEL-IR-HC 0 – 100% LEL < 30 sec. Class 1, Div 1
NH3 0 – 100 ppm < 90 sec. Class 1, Div 2
NH3 300 0 – 300 ppm < 120 sec. Class 1, Div 2
NH3 A 0 – 1000 ppm < 120 sec. Class 1, Div 2
NO2 0 – 20 ppm < 25 sec. Class 1, Div 2
O2 0 – 25 Vol. < 15 sec. Class 1, Div 1
PH3 0 – 5 ppm < 30 sec. Class 1, Div 2
SO2 0 – 20 ppm < 35 sec. Class 1, Div 1

Specifications

Sensor Type Electrochemical, infrared, catalytic bead
Operating Voltage Wired power (3-Wire) 12 to 35 VDC
Power Draw 2 Watts maximum
Protection Power electromagnetic interference (EMI) filter

4-20 mA surge suppression

RS-485 surge suppression

Display Screen 102×64 Resolution graphical LCD screen transflective (sunlight readable) with white LED backlight
Interface 3 Push-buttons (MENU, ADD and SUB)

3 Magnetic non-intrusive switches for calibration

Customizable Settings 2 Individual-configurable alarm LED/relay set-points
Temperature Range -40°C to +60°C (-40°F to +140°F)
Output (digital) RS-485 modbus
Wired (Analog) Output 4-20 mA (3-Wire)

Fault terminal, wet relay contact. Has it’s own power.

Optional 2 dry-contact relays with replaceable 4 amp fuses.

Product Dimensions 5.5 in, L x 6 in. W x 7 in. H (8 in. W x 17 in. H Max. dimensions with attachments)
Total Weight 6 lbs.
Remote Sensor Kit

(Optional Additional Feature)

Remote sensor kit with enclosure (5 pin)

• Electrochemical sensor max. length: 250 feet

• Infrared sensor max. length: 40 feet

• Catalytic bead sensor max. length: 15 feet

Hazardous Location

Approvals

Main Enclosure Certified explosion / flame proof CQPSUS

Class I, Division 1 & 2, Groups B, C & D

Nema 3, 4, 4X, 7 (B, C, D) 9 (E, F, G)

Temp.= -20°C to +60°C

Sensor Housing Certified explosion / flame proof CQPSUS

Class I, Division 1 & 2, Groups B, C & D

Temp.= -40°C to +60°C

Note: Certification only applies to some gases. Toxic gases not certified for Div. 1 locations are suitable for Div. 2 applications but have no third party approval.

Controllers Controllers compatible with all RKI Beacon controllers, as well as most DCS / PLC systems: Beacon 110, Beacon 200, Beacon 410A, Beacon 800, and MC-6400
Warranty 1-Year warranty for electronics and sensor

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T3A Literature

Product Datasheet Operating Manuals
T3A Datasheet

T3A Product Datasheet

T3A Manual

T3A Operator’s Manual

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T3A Price List & Resources