1. Introduction
The Hembisen KH158 is an advanced 4-in-1 plug-in detector designed to enhance safety in your home, apartment, RV, or other living spaces. It provides real-time monitoring and alerts for combustible gases (such as natural gas, methane, propane, LNG, LPG) and carbon monoxide (CO). Additionally, it displays ambient temperature in Fahrenheit and relative humidity, offering a comprehensive overview of your environment.
2. Important Safety Information
WARNING: This device is a safety alarm. It is not a substitute for proper installation, use, and maintenance of fuel-burning appliances, including appropriate ventilation systems. Carbon monoxide is an odorless, colorless gas that can be fatal. Combustible gases can cause explosions or fires. Always follow local codes and regulations for detector placement and maintenance.
- Do not block the detector's vents.
- Do not paint the detector.
- Test the detector regularly using the 'SELF-TEST' button.
- If an alarm sounds, evacuate the area immediately and contact emergency services.
3. Product Overview
The Hembisen KH158 features a compact design with a clear color display and audible alerts. It integrates multiple sensors for comprehensive environmental monitoring.
Key Features:
- 4-in-1 Sensor: Detects natural gas, carbon monoxide, temperature, and humidity.
- Real-time Monitoring: Digital display shows current CO (PPM), gas (%LEL), temperature (°F), and humidity (RH%).
- Audible Alarm: 85dB alarm sound alerts you to dangerous gas or CO levels.
- Plug-in Design: Easy installation with a rotatable plug for flexible placement.
- Advanced Sensors: Utilizes catalytic combustion sensor for combustible gas and electrochemical sensor for carbon monoxide.
Components:
Image 3.1: Front and side view of the Hembisen KH158 detector, highlighting the display, test button, air inlet, and rotatable plug.
Image 3.2: Diagram illustrating the internal electrochemical and catalytic combustion sensors, digital display, and 85dB voice alarm feature.
4. Setup
The Hembisen KH158 is designed for simple plug-and-play installation.
Placement:
- Plug the detector into a standard AC outlet. The plug is rotatable to accommodate different outlet orientations.
- For optimal gas detection, place the detector near potential leak sources (e.g., gas stoves, water heaters, furnaces).
- For CO detection, place it in living areas and bedrooms. Avoid placing it directly above heat sources or in areas with high humidity (like bathrooms) unless specifically designed for such environments.
- Ensure the detector is not obstructed by furniture, curtains, or other objects that could block the air vents.
Initial Power-On:
Upon plugging in, the detector will initiate a self-calibration process, which may take a few minutes. During this time, the display will show fluctuating readings and indicator lights may flash. Once calibration is complete, the display will stabilize, typically showing '0' for CO and gas levels, along with current temperature and humidity.
Image 4.1: The Hembisen KH158 detector plugged into a standard wall outlet, demonstrating its compact and unobtrusive installation.
5. Operating Instructions
The detector operates continuously once plugged in. The color display provides real-time information about your environment.
Display Readings:
- CO (PPM): Displays carbon monoxide concentration in parts per million.
- GAS (%LEL): Displays combustible gas concentration as a percentage of the Lower Explosive Limit.
- Temperature (°F): Shows ambient temperature in Fahrenheit.
- Humidity (RH%): Shows relative humidity percentage.
Self-Test Function:
Press the 'SELF-TEST' button to verify the alarm's functionality. The detector will emit an audible alarm and flash its indicator lights. This test should be performed regularly (e.g., monthly) to ensure proper operation.
Video 5.1: Demonstration of the Hembisen KH158's self-test function and gas detection capabilities using a propane torch. The video shows the audible alarm and visual indicators activating upon gas exposure.
6. Alarms and Indicators
The detector uses visual and audible signals to communicate its status.
Indicator Lights:
- POWER (Green): Illuminates when the device is powered on and operating normally.
- FAULT (Yellow): Illuminates to indicate a malfunction or error with the detector. Refer to troubleshooting.
- ALARM (Red): Flashes and an audible alarm sounds when dangerous levels of CO or combustible gas are detected.
Alarm Thresholds:
- Carbon Monoxide (CO): Alarm activates at 150 PPM.
- Combustible Gas: Alarm activates at 10% LEL (Lower Explosive Limit).
7. Maintenance
Regular maintenance ensures the longevity and accuracy of your detector.
- Monthly Test: Press the 'SELF-TEST' button monthly to confirm the alarm and lights are functioning.
- Cleaning: Gently wipe the exterior of the detector with a soft, damp cloth. Do not use cleaning sprays, solvents, or polishes. Avoid getting water into the vents.
- Ventilation: Ensure the air vents on the detector are free from dust, debris, or obstructions.
- Avoid Harsh Environments: Do not expose the detector to extreme temperatures, high humidity, or corrosive chemicals.
8. Troubleshooting
If you encounter issues with your Hembisen KH158, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No display/No power | Power outage, loose plug, faulty outlet. | Check power supply, ensure plug is secure, try a different outlet. |
| FAULT light on | Sensor malfunction, internal error. | Unplug and re-plug the device. If the fault persists, contact customer support. |
| False alarm (no detectable gas/CO) | Interference from aerosols, strong cleaning agents, high humidity, or temporary gas/CO presence. | Ventilate the area. If the alarm stops, monitor the environment. If it continues, treat it as a real alarm. |
| Alarm sounds (real event) | Presence of dangerous levels of CO or combustible gas. | EVACUATE IMMEDIATELY. Call emergency services (e.g., 911, fire department, gas company). Do not re-enter until cleared by professionals. |
9. Specifications
- Brand: Hembisen
- Model Number: KH158
- Power Source: Plug-in (AC)
- Color: Black
- Product Dimensions: 0.03"D x 0.05"W x 0.04"H (Note: These dimensions appear to be incorrect based on product images and typical device sizes. Please refer to actual product for accurate measurements.)
- Item Weight: 1.6 ounces
- Alarm Sound Level: 85dB
- Operating Humidity: Up to 95%
- Sensor Type: Catalytic (for gas), Electrochemical (for CO)
- Material: ABS
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact Hembisen customer service or refer to the contact details provided with your purchase. Keep your purchase receipt as proof of purchase.
