1. Introduction
This manual provides essential information for the safe and effective use of your KH158 4-in-1 Carbon Monoxide & Natural Gas Detector. This device is designed to enhance your home safety by continuously monitoring for carbon monoxide (CO) and combustible natural gas, while also displaying ambient temperature and humidity.
2. Key Features
- 4-in-1 Detection: Integrates carbon monoxide, combustible gas, temperature, and humidity sensors.
- Real-time Display: HD screen shows CO concentration (ppm), combustible gas indicator bar, humidity (RH%), temperature (°F), CO indicator icon, and alarm status.
- High Accuracy & Fast Response: Imported electrochemical sensor for CO with 0-2000ppm range and <5 seconds response time.
- Loud Alarm: ≥85dB sound and light alarm for critical gas detection.
- Plug-and-Play Design: US standard plug compatible with AC110-220V outlets for easy installation.
- Self-Test Function: Allows for quick verification of alarm functionality.
3. Package Contents
Please check the package for the following items:
- 1 x KH158 Carbon Monoxide & Natural Gas Detector
- 1 x Paper Box
- 1 x User Manual (English)
4. Product Overview
Familiarize yourself with the components and display of your detector:
Figure 1: Front and Rear Labeled Diagram of the KH158 Detector
Figure 2: KH158 Detector Dimensions
5. Setup and Installation
The KH158 detector is designed for easy plug-and-play installation.
- Choose a Location:
- For Carbon Monoxide detection, place the detector at breathing height, typically 1.5 meters (5 feet) from the floor. Avoid placing it directly above or next to fuel-burning appliances.
- For Natural Gas detection, natural gas is lighter than air, so place the detector higher on the wall, near the ceiling, but not directly in the path of ventilation.
- Avoid areas with high humidity (e.g., directly above a sink or shower), excessive dust, grease, or direct sunlight.
- Suitable locations include bedrooms, kitchens, living rooms, basements, hotel rooms, and camping areas.
- Plug In: Insert the detector into a standard AC110-220V US wall outlet. Ensure the outlet is not controlled by a switch that could accidentally turn off power to the detector.
- Preheating: Upon plugging in, the detector will undergo a 180-second preheating countdown. During this time, the display may show various readings or a countdown. The device is not fully operational until the preheating is complete.
- Initial Self-Test: After preheating, press the "SELF-TEST" button to confirm the alarm function. The red light should flash, and an alarm sound should be heard, indicating normal operation.
Figure 3: Plug-and-Play Installation
6. Operation
Once installed and preheated, the detector continuously monitors the environment.
- Display Readings: The HD screen provides real-time data:
- CO ppm: Current Carbon Monoxide concentration.
- %LEL: Combustible gas concentration (as a percentage of the Lower Explosive Limit).
- °F: Ambient temperature in Fahrenheit.
- RH%: Relative humidity percentage.
- Indicator Icons: Icons for CO, Gas, Power, Fault, and Alarm status.
- Self-Test Function: Periodically press the "SELF-TEST" button to ensure the alarm is working correctly. The red light will flash, and the alarm will sound briefly.
7. Alarm Conditions and Response
The detector will activate an alarm under the following conditions:
- Carbon Monoxide (CO) Alarm: The alarm will sound when the CO concentration exceeds 150ppm. The red alarm light will flash, and the device will emit an audible alarm (≥85dB).
- Natural Gas Alarm: The alarm will sound when the natural gas concentration exceeds 2500ppm (5% LEL). The gas indicator bar icon will change color, the red alarm light will flash, and an audible alarm (≥85dB) will be emitted.
If an Alarm Sounds:
- Immediately move to fresh air outdoors or open all doors and windows to ventilate the area.
- Do not re-enter the premises until the alarm has stopped and the area has been thoroughly ventilated.
- If the source of the gas leak is unknown or cannot be resolved, contact emergency services or a qualified technician.
8. Maintenance
- Cleaning: Regularly wipe the detector with a soft, damp cloth. Do not use harsh chemicals, cleaning solvents, or abrasive cleaners. Do not spray cleaning agents directly into the detector.
- Sensor Life: The sensors have an estimated lifespan of 2 years. After this period, the detector's accuracy may degrade, and replacement is recommended.
- Avoid Obstruction: Ensure the air inlet and outlet are not blocked by dust, debris, or furniture.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Detector does not power on. | No power from outlet; faulty outlet. | Check the power outlet with another device. Try a different outlet. |
| Alarm sounds without apparent gas leak. | False alarm due to steam, cooking fumes, or aerosols; sensor malfunction. | Ventilate the area. Relocate the detector away from sources of steam/fumes. If persistent, contact support. |
| Self-test fails (no light/sound). | Internal fault; power issue. | Ensure proper power. If issue persists after power cycle, the unit may be faulty and require replacement. |
| Inaccurate temperature/humidity readings. | Placement near heat/cold sources; sensor obstruction. | Relocate the detector to an area with stable ambient conditions. Ensure sensors are clear. |
10. Specifications
| Parameter | Value |
|---|---|
| Model | KH158 |
| Material | ABS |
| Power Supply | Plug-in type, AC110-220V |
| Plug Type | US Plug |
| Alarm Current | <120mA |
| Static Power Consumption | ≤2W |
| Alarm Power Consumption | ≤3W |
| CO Alarm Concentration | 150ppm |
| Natural Gas Alarm Concentration | >2500ppm (5% LEL) |
| CO Detection Range | 0-2000ppm |
| Minimum Display Concentration | >0ppm |
| GAS Detection Concentration Range | 0~10%LEL |
| Operating Temperature | -10℃~55℃ |
| Operating Humidity | ≤95% RH (no condensation) |
| Storage Temperature | -25℃~55℃ |
| Storage Humidity | ≤95% RH (no condensation) |
| Alarm Indication | Red light flashes, audible alarm |
| Alarm Decibel | ≥85Db |
| Sensor Lifespan | 2 years |
| Preheating Countdown | 180 seconds |
| Temperature Display Range | 1-176℉ (±4℉) |
| Humidity Display Range | 0-99% (±5%) |
| Item Size | 119 x 52 x 49mm (4.68 x 2.04 x 1.93in) |
| Item Weight | 84g (2.96oz) |
11. User Tips
- Plug Compatibility: This model is equipped with a US standard plug. Please ensure it is compatible with your region's electrical outlets or use an appropriate adapter if necessary.
- Optimal Placement: Consider the density of the gases you are monitoring. For CO (similar to air), place at mid-height. For natural gas (lighter than air), place higher.
- Regular Testing: Perform the self-test function weekly to ensure the alarm system is fully operational.
12. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact details provided by your retailer or the manufacturer. Keep your purchase receipt as proof of purchase.
