The Bently Nevada 350800-01-180-00 is a high-performance Hazardous Gas Sensor designed for use within the 3500/63 Hazardous Gas Detection System. This continuous-diffusion catalytic bead sensor provides critical machinery and personnel protection by continuously monitoring areas for combustible gases, specifically focusing on methane (CH4) and hydrogen (H2).
The sensor operates via a matched pair of catalytic and reference beads that form a Wheatstone bridge configuration when interfaced with the 3500/63 monitor module. The catalytic bead is coated with a premium oxidization-promoting catalyst, while the reference bead is specially treated to inhibit oxidization. When combustible gas comes into contact with the sensing surface, the electrical current supplied by the monitor heats the beads, initiating localized oxidation at the catalytic bead. This chemical reaction increases the temperature and internal resistance of the active bead relative to the reference bead, unbalancing the Wheatstone bridge proportionally to the concentration of the target combustible gas up to 100% LEL.
Engineered for extreme reliability, the Bently Nevada 350800-01-180-00 can be threaded directly into standard structural conduit lines or integrated into a dedicated flameproof junction box enclosure to optimize routing and simplify field wiring terminations. The sensor configuration requires a continuous constant current of 300 mA from an external power source regulated directly through the 3500/63 monitor and input/output (I/O) module array.
| Parameter | Specification Value |
| Manufacturer | Bently Nevada (A Baker Hughes Business / General Electric Company) |
| Country of Origin | United States of America |
| Sensor Type | Flameproof, continuous diffusion, catalytic bead |
| Target Gases | Methane (CH4) and Hydrogen (H2) |
| Measurement Range | 0% to 100% LEL (Lower Explosive Limit) |
| Constant Current Drive | 300 mA per sensor channel |
| Initial Sensitivity | > 15 mV / % LEL |
| Minimum Calibration Threshold | 6 mV / % LEL (Spent/poisoned cut-off) |
| Long-Term Zero Drift | < ±2.5% LEL per month (at 20 degC, 50% RH, 101 kPa) |
| Long-Term Sensitivity Drift | < 2.5% Signal per month (at 20 degC, 50% RH, 101 kPa) |
| Temperature Zero Shift | ≤ ±5% LEL over range -40 Celsius to 200 Celsius |
| Step Response Time (T50) | < 10 s to reach 50% LEL reading with 100% LEL gas applied |
| Step Response Time (T60) | < 12 s to reach 60% LEL reading with 100% LEL gas applied |
| Manual Calibration Flow Rate | 0.5 L / min |
| Remote Calibration Flow Rate | 2.0 L / min |
| Operating Temperature Range | -40 Celsius to 200 Celsius (-40 Fahrenheit to 392 Fahrenheit) |
| Lead Wire Length | 180 Inch |
| Housing Enclosure Rating | None (Screws directly into conduit) |
| Connector Pin / Wire Color | Function / Signal Designation |
| White | Vb (Wheatstone Bridge Volts Return Connection) |
| Red | Vx (Constant Current Input Line Positive / Bridge Excitation) |
| Black | Return (Constant Current Return / Negative Signal Line) |
What gases can be detected with the 350800 sensor?
The sensor is designed specifically to detect methane and hydrogen gas concentrations up to their lower explosive limits.
What is the length of the lead wire provided with this model?
This model comes with a factory-integrated 180-inch lead wire.
What is the minimum warm-up timeline required before attempting a field calibration?
The sensor must be powered continuously via the monitoring system for at least 30 minutes to stabilize before beginning calibration.
What happens if the internal sensitivity of the sensor falls below 6 mV/% LEL?
The sensor will fail system verification checks and cannot be calibrated, indicating it is spent or poisoned.
Can the excess lead wire be coiled inside the housing?
No, coiling excess lead wire inside junction boxes can cause interference and is prohibited; leads must be cut to the required installation length.
What is the maximum operating temperature limit for this sensor head?
The sensor is rated for reliable continuous operation in extreme environments up to 200 Celsius.
What is the primary operational mechanism behind the sensor?
It uses a matched catalytic and reference bead Wheatstone bridge circuit that detects the temperature variance caused by gas oxidation.
How often does the monitoring system require recalibration of the sensor channels?
The hazardous gas channel and sensor combination must be calibrated at minimum every 90 days to comply with safety compliance.
What are the primary chemical poisons that damage the catalytic element?
Silicone-based RTV compounds, chlorinated hydrocarbons, metal hydrides, and heavy hydrocarbon vapors will poison or reduce bead sensitivity.
What calibration flow rate is required when performing a manual calibration?
A regulated flow rate of 0.5 liters per minute must be maintained during a standard manual calibration cycle.
Does this specific model include a flameproof housing enclosure?
No, the option suffix indicates it is supplied without a housing, allowing direct integration into conduit networks.
What is the expected life expectancy of the sensor in standard industrial service?
The sensor provides a minimum life of 2 years, with an average service lifecycle reaching up to 5 years under normal conditions.
What color-coding standard is utilized for field terminal connection wiring?
The sensor connections use a 3-wire format consisting of a White wire for return, a Red wire for excitation, and a Black wire for constant current.
Can this sensor be deployed in Zone 1 locations?
Yes, the sensor is certified flameproof with ATEX/IEC markings for safe installation inside Zone 1 hazardous environments.
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Returns & Warranty
Manufacturer: Bently Nevada
Product No.: 350800-01-180
Country of origin:United States
Product Type: Hazardous Gas Sensor
Barcode: 8537101190
Payment: T/T, Western Union
Weight: 810g
Shipping port: Xiamen
Warranty: 12 months
The Bently Nevada 350800-01-180-00 is a high-performance Hazardous Gas Sensor designed for use within the 3500/63 Hazardous Gas Detection System. This continuous-diffusion catalytic bead sensor provides critical machinery and personnel protection by continuously monitoring areas for combustible gases, specifically focusing on methane (CH4) and hydrogen (H2).
The sensor operates via a matched pair of catalytic and reference beads that form a Wheatstone bridge configuration when interfaced with the 3500/63 monitor module. The catalytic bead is coated with a premium oxidization-promoting catalyst, while the reference bead is specially treated to inhibit oxidization. When combustible gas comes into contact with the sensing surface, the electrical current supplied by the monitor heats the beads, initiating localized oxidation at the catalytic bead. This chemical reaction increases the temperature and internal resistance of the active bead relative to the reference bead, unbalancing the Wheatstone bridge proportionally to the concentration of the target combustible gas up to 100% LEL.
Engineered for extreme reliability, the Bently Nevada 350800-01-180-00 can be threaded directly into standard structural conduit lines or integrated into a dedicated flameproof junction box enclosure to optimize routing and simplify field wiring terminations. The sensor configuration requires a continuous constant current of 300 mA from an external power source regulated directly through the 3500/63 monitor and input/output (I/O) module array.
| Parameter | Specification Value |
| Manufacturer | Bently Nevada (A Baker Hughes Business / General Electric Company) |
| Country of Origin | United States of America |
| Sensor Type | Flameproof, continuous diffusion, catalytic bead |
| Target Gases | Methane (CH4) and Hydrogen (H2) |
| Measurement Range | 0% to 100% LEL (Lower Explosive Limit) |
| Constant Current Drive | 300 mA per sensor channel |
| Initial Sensitivity | > 15 mV / % LEL |
| Minimum Calibration Threshold | 6 mV / % LEL (Spent/poisoned cut-off) |
| Long-Term Zero Drift | < ±2.5% LEL per month (at 20 degC, 50% RH, 101 kPa) |
| Long-Term Sensitivity Drift | < 2.5% Signal per month (at 20 degC, 50% RH, 101 kPa) |
| Temperature Zero Shift | ≤ ±5% LEL over range -40 Celsius to 200 Celsius |
| Step Response Time (T50) | < 10 s to reach 50% LEL reading with 100% LEL gas applied |
| Step Response Time (T60) | < 12 s to reach 60% LEL reading with 100% LEL gas applied |
| Manual Calibration Flow Rate | 0.5 L / min |
| Remote Calibration Flow Rate | 2.0 L / min |
| Operating Temperature Range | -40 Celsius to 200 Celsius (-40 Fahrenheit to 392 Fahrenheit) |
| Lead Wire Length | 180 Inch |
| Housing Enclosure Rating | None (Screws directly into conduit) |
| Connector Pin / Wire Color | Function / Signal Designation |
| White | Vb (Wheatstone Bridge Volts Return Connection) |
| Red | Vx (Constant Current Input Line Positive / Bridge Excitation) |
| Black | Return (Constant Current Return / Negative Signal Line) |
What gases can be detected with the 350800 sensor?
The sensor is designed specifically to detect methane and hydrogen gas concentrations up to their lower explosive limits.
What is the length of the lead wire provided with this model?
This model comes with a factory-integrated 180-inch lead wire.
What is the minimum warm-up timeline required before attempting a field calibration?
The sensor must be powered continuously via the monitoring system for at least 30 minutes to stabilize before beginning calibration.
What happens if the internal sensitivity of the sensor falls below 6 mV/% LEL?
The sensor will fail system verification checks and cannot be calibrated, indicating it is spent or poisoned.
Can the excess lead wire be coiled inside the housing?
No, coiling excess lead wire inside junction boxes can cause interference and is prohibited; leads must be cut to the required installation length.
What is the maximum operating temperature limit for this sensor head?
The sensor is rated for reliable continuous operation in extreme environments up to 200 Celsius.
What is the primary operational mechanism behind the sensor?
It uses a matched catalytic and reference bead Wheatstone bridge circuit that detects the temperature variance caused by gas oxidation.
How often does the monitoring system require recalibration of the sensor channels?
The hazardous gas channel and sensor combination must be calibrated at minimum every 90 days to comply with safety compliance.
What are the primary chemical poisons that damage the catalytic element?
Silicone-based RTV compounds, chlorinated hydrocarbons, metal hydrides, and heavy hydrocarbon vapors will poison or reduce bead sensitivity.
What calibration flow rate is required when performing a manual calibration?
A regulated flow rate of 0.5 liters per minute must be maintained during a standard manual calibration cycle.
Does this specific model include a flameproof housing enclosure?
No, the option suffix indicates it is supplied without a housing, allowing direct integration into conduit networks.
What is the expected life expectancy of the sensor in standard industrial service?
The sensor provides a minimum life of 2 years, with an average service lifecycle reaching up to 5 years under normal conditions.
What color-coding standard is utilized for field terminal connection wiring?
The sensor connections use a 3-wire format consisting of a White wire for return, a Red wire for excitation, and a Black wire for constant current.
Can this sensor be deployed in Zone 1 locations?
Yes, the sensor is certified flameproof with ATEX/IEC markings for safe installation inside Zone 1 hazardous environments.
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Color pattern |
Silver
|
| Country of origin |
United States
|
| Power source |
DC Power
|
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