Intrinsically Safe Carbon Monoxide Detector with Explosion Proof
Detection gas:CO,Carbon monoxide
Range:0-1000ppm/0-5000ppm/custom
Detection Principle:Electrochemistry
Resolution:1ppm
Detection Accuracy:±2%F.S
Model:HNAG1000
Product Description
Highlights at a glance
Carbon Monoxide Sensor: High sensitivity electrochemical carbon monoxide sensor made of corrosion resistant materials, designed for gas detection system integration.
Stable Signal Transmission: Standard RS485 bus output, compatible with various PLC and DCS systems, ensuring stable and reliable data communication.
Sensor Specifications: Detection range 0-100 ppm, response time ≤30s, working temperature -10℃~+50℃, automatic zero point tracking to prevent drift.
System Integration Scenarios: Suitable for integration into industrial gas monitoring systems, environmental protection monitoring equipment and intelligent building control systems.
Industrial Supply Support: Bulk wholesale available, technical parameters customization, providing integration guidance and 1-year product warranty.
Online Gas Detector Parameter Table
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Signal Output |
①4-20mA signal: standard 12-bit precision 4-20mA output chip, transmission distance 1Km |
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②RS485 signal: using standard MODBUS RTU protocol, transmission distance 1Km |
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③Voltage signal: 0.4-2V, 0-5V, 0-10V output, optional (choose one of voltage output or current output) |
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④Switching signal: Standard configuration is 1 set of passive contact relay, capacity 220VAC3AV/24VDC3A |
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Measured Gas |
O2/Custom |
Testing Principle |
IR / PID/custom |
Precision |
±2%F.S |
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Range |
0-100%VOL/Custom |
Resolution |
0.1%VOL/Custom |
Working Temp |
-20 ～ 50℃ |
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Humidity |
0-95%RH |
Response Time |
T90<10S |
Storage Temp |
-20 ～ 50℃ |
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Warm-up Time |
10S |
Working Pressure |
86kpa-106kpa |
Working Current |
≤50mA |
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Working Voltage |
DC5V±1%/DC24±1% |
Baud Rate |
9600 |
Size |
220*205*97 |
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Installation |
Wall-mounted, pipe... |
Warranty |
1year |
Service Life |
3-5years |
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IP Grade |
IP66 |
Explosion-proof |
E x d I IC T 6 / EX ATEX |
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Receiving Equipment |
pc, control alarm, PLC, DCS, DDC system |
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Alarm Code |
On-site sound and light alarm, external alarm, remote controller alarm, computer data collection software alarm, etc. |
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Alarm Setting |
Two-level alarm is standard, three-level alarm is optional; alarm mode can be set: regular high and low alarm, interval control alarm |
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Connecting Cables |
① For 4~20mA, choose a three-core shielded cable, and for RS485, choose a four-core cable. When the distance exceeds 1000 meters (with a detector), the single wire diameter is ≥ 1.5mm, and the shielding layer is connected to the earth. |
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②Wireless transmission: LORA and Zigbeg modules can be built-in for short-range wireless transmission; GPRS/4G modules can be externally used to transmit remote data to the cloud platform, and historical records can be viewed on computers and mobile phones without distance restrictions (optional) |
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| Interface Display | Internal diagram of the detector | Sensor |
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FAQ:
Q1: How should the detection points be selected for installation location and height?
A: This is key to ensuring effective monitoring. General principles are:
Close to Leak Sources: Within 1-3 meters of potential leak sources such as valves, flanges, compressors, etc.
Consider Gas Properties: Carbon monoxide density is slightly lower than air. It is recommended to install at breathing zone height, i.e., 1.5-1.8 meters from the ground or platform.
Follow Airflow Direction: Install on the path where gas is likely to diffuse and accumulate. Avoid positions directly impacted by strong airflow such as vents or fans.
Cover Critical Areas: Entrances to control rooms where personnel are frequently stationed, inspection walkways, and equipment room doorways.
We can provide professional layout design suggestions based on your site floor plan and risk assessment.
Q2: How are the alarm values set? What are the standards?
A: Typically, a two-level alarm system is used:
Primary Alarm (Low Alarm): Set at 500 ppm. This is the action threshold, indicating a leak or abnormal concentration increase, requiring ventilation and inspection.
Secondary Alarm (High Alarm): Set at 800 ppm. This is the danger threshold, meaning a clear hazard exists, requiring immediate activation of emergency procedures and evacuation of non-essential personnel.
Alarm values can be set freely.
Q3: What output signals are available? How can they be connected to our existing control system?
A: Standard equipment provides a 4-20mA analog signal (corresponding to gas concentration) and relay alarm switch signals (dry contact). It also supports the RS485 Modbus RTU digital communication protocol. These can be easily connected to your PLC, DCS, GDS (Gas Detection System), or SCADA software for centralized monitoring, data logging, and historical querying.
C. Operation, Calibration & Maintenance
Q4: How often does the instrument need calibration? Is the calibration process complicated?
A: To ensure measurement accuracy, we recommend:
Regular Calibration: Perform calibration every 6 to 12 months.
After Shock or Repair: If the instrument is exposed to high gas concentrations or undergoes repair, it should be calibrated immediately.
The calibration process is relatively simple: using a standard gas of known concentration (e.g., 500ppm CO) and a calibration adapter, after introducing the gas, follow the prompts on the instrument interface or via a handheld calibrator to perform "zero" and "span" calibration.
Q5: What daily maintenance work is required?
A: Daily maintenance is very simple:
Visual Inspection: Monthly check for physical integrity of the instrument, clarity of the display, and ensure the air inlet is not blocked.
Functional Test: Monthly use of a test shroud and standard test gas (or a test pen with calibration gas) to perform an alarm function test, verifying normal response.
Cleaning: Regularly clean the exterior with a damp cloth, ensuring the sensor filter membrane is not covered by dust or oil.
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