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GDX-350
Gas Sensor Transmitter/Monitor
Bacharach's new state-of-the-art GDX-350 transmitters, with Smart Sensor technology, provide
accurate and continuous detection of toxic, combustible and asphyxiate gases. The full-featured
design of the GDX-350 includes a large LCD display, a 4-20 mA interface, programmable alarms,
optional relays and a Modbus interface. Exclusive pre-calibrated replacement sensor technology
makes occasional maintenance practically effortless. Specially designed to function in the extreme
temperature conditions found in blast chillers and deep freezers, the rugged construction, intrinsic
safety capability (in two-wire mode with barrier) and an explosion-proof housing allow the GDX-350
to be placed in hazardous-rated areas of many industrial environments - delivering reliable,
superior-sensing performance to protect human life, equipment and property.
Features & Benefits
- Pre-calibrated Smart Sensor capability with 'plug-n-play' convenience minimizes maintenance and downtime
- Non-Dispersive Infrared (NDIR), Catalytic Bead and Electrochemical sensor options available
- Can be placed directly in hazardous environments where leaks occur for quick detection and rapid response
- Graphic LCD for real-time monitoring of concentrations
- 4-20 mA, optional Modbus RTU® and wireless interface
- Easily update alarm set points, configurations or maintenance modes using the LCD display
- 30-minute onboard data trend
Gases
| Gas Type |
Measuring Range |
Display Increments |
Sensor Type |
| Ammonia (NH3) |
0-500 ppm |
1 ppm |
Electrochemical |
| Carbon Dioxide (CO2 ) |
0-5% vol |
0.1% |
Infrared (NDIR) |
| Carbon Monoxide (CO) |
0-1000 ppm |
1 ppm |
Electrochemical |
| Hydrogen (H2) |
0-1000 ppm |
1 ppm |
Electrochemical |
| Hydrogen Sulfide (H2S) |
0-500 ppm |
1 ppm |
Electrochemical |
| Hydrocarbon (CH4) |
0-100% LEL |
1% |
Infrared (NDIR) |
| Methane (CH4) |
0-100% LEL |
1% |
Catalytic Bead |
| Nitrogen Dioxide (NO2) |
0-99.9 ppm |
0.1 ppm |
Infrared (NDIR) |
| Oxygen (O2) |
0-25% |
0.1% |
Electrochemical |
| Phosphine (PH3) |
0-5 ppm |
0.01 ppm |
Electrochemical |
| Propane (C3H8) |
0-100% LEL |
1% |
Infrared (NDIR) |
| Sulfur Dioxide (SO2) |
0-99.9 ppm |
0.1 ppm |
Electrochemical |
Specifications
| Dimensions |
8.0" x 5.5" x 4.61" (20.32 cm x 13.97 cm x 11.71 cm) |
| Housing |
Durable Aluminum Enclosure - Suitable for Class 1, Div. 1 & 2, Groups B, C, D |
| Front Panel |
5 Indicator Lights: Alarm 1, Alarm 2, Fail, In Calibration, and RS-485 |
| User Interface |
64 x 128 Pixel LCD Graphic Display for Gas Readings, 30 Minute Trend, Bar Graphing, Engineering Units and Backlight |
| Operating Temperature Range |
-40°F to 140°F (-40°C to 60°C) |
| Ambient Humidity Range |
5% - 90% RH Non-Condensing |
| Security Mode |
Lock Out Critical Parameters |
| 4-20 mA Output Signal |
3-wire, 4-20 mA. Max Loop Resistance is 750 Ω (@24 VDC) |
| Alarm Relays |
3 Configurable Form C (SPDT) Relays rated for 5 amp at 30 VDC or 240 ~ VAC RESISTIVE. | Relay 1 and Relay 2 Level Alarms are
configurable for HIGH or LOW Trip, for Normally Energized (Failsafe) or Normally De-Energized and for Latching or Non-Latching.
Relay 3 is always Normally Energized for Failsafe Operation so any loss of power to the GDX-350 will be indicated as a "FAULT" condition. |
| Communications |
RS-485, Modbus® |
| Power |
10 - 30 VDC, 250 mA (@ 24 VDC) |
| Power Safety Mode |
Fully automatic system reset. All program parameters are retained. |
| Approvals |
CSA: Division 1 & 2, Class 1: Groups B, C, D (excludes NH3 |
Ordering Information - Common Configurations*
| Part Number |
Description |
| 5600-3011 |
GDX-350 [CO] 0-1,000 ppm, 3-wire |
| 5600-3021 |
GDX-350 [H2S] 0-500 ppm, 3-wire |
| 5600-3031 |
GDX-350 [O2] 0-25%, 3-wire |
| 5600-3041 |
GDX-350 [NO2] 0-100 ppm, 3-wire |
| 5600-3051 |
GDX-350 [NH3] 0-500 ppm, 3-wire |
| 5600-3061 |
GDX-350 [SO2] 0-100 ppm, 3-wire |
| 5600-3071 |
GDX-350 [PH3] 0-5 ppm, 3-wire |
| 5600-3201 |
GDX-350 [CH4] 0-100% LEL, Cat. Bead, 3-wire |
| 5600-3211 |
GDX-350 [CH4] 0-100% LEL, IR, 3-wire |
| 5600-3221 |
GDX-350 [CO2] 0-5% Vol., IR, 3-wire |
| 5600-3231 |
GDX-350 [Propane] 0-100% LEL, IR, 3-wire |
| 5600-3241 |
GDX-350 Pentane 0-100% LEL, IR, 3-wire |
| 5600-3012 |
GDX-350 [CO] 0-1,000 ppm, 3-wire - with Relays and Modbus® |
| 5600-3022 |
GDX-350 [H2S] 0-500 ppm, 3-wire - with Relays and Modbus® |
| 5600-3032 |
GDX-350 [O2] 0-25%, 3-wire - with Relays and Modbus® |
| 5600-3042 |
GDX-350 [NO2] 0-100 ppm, 3-wire - with Relays and Modbus® |
| 5600-3052 |
GDX-350 [NH3] 0-500 ppm, 3-wire - with Relays and Modbus® |
| 5600-3202 |
GDX-350 [CH4] 0-100% LEL, Cat. Bead, 3-wire - with Relays and Modbus® |
| 5600-3212 |
GDX-350 [CH4] 0-100% LEL, IR, 3-wire - with Relays and Modbus® |
| 5600-3222 |
GDX-350 [CO2] 0-5% Vol., IR, 3-wire - with Relays and Modbus® |
*Customized sensor configurations are available based on your specific needs. Ask your authorized Bacharach representative for details.
Replacement Parts & Accessories
| Part Number | Description |
|---|
| 5600-6010 | GDX-350 Smart CO Sensor, Pre-Calibrated Replacement |
| 5600-6020 |
GDX-350 Smart H2S Sensor, Pre-Calibrated Replacement |
| 5600-6030 |
GDX-350 Smart O2 Sensor, Pre-Calibrated Replacement |
| 5600-6040 |
GDX-350 Smart NO2 Sensor, Pre-Calibrated Replacement |
| 5600-6050 |
GDX-350 Smart NH3 Sensor, Pre-Calibrated Replacement |
| 5600-6060 |
GDX-350 Smart SO2 Sensor, Pre-Calibrated Replacement |
| 5600-6070 |
GDX-350 Smart PH3 Sensor, Pre-Calibrated Replacement |
| 5600-6110 |
GDX-350 Smart H2 Sensor, Pre-Calibrated Replacement |
| 5600-6200 |
GDX-350 Smart CH4 Sensor (Cat. Bead), Pre-Calibrated Replacement |
| 5600-6210 |
GDX-350 Smart CH4 Sensor (IR), Pre-Calibrated Replacement |
| 5600-6220 |
GDX-350 Smart CO2 Sensor, Pre-Calibrated Replacement |
| 5600-6330 |
GDX-350 Smart Propane Sensor (IR), Pre-Calibrated Replacement |
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Datasheet
