Our review covers the Astra series of opto-electronic IR detectors from Teko, a well-regarded brand known for quality and reliability in security systems. These detectors are designed for indoor use and provide effective detection by monitoring infrared (IR) signals. Below is a detailed overview of several models, along with their key specifications and practical recommendations. 📹🔒
Astra-5 Series
Astra-5A
Type: Passive IR Detector with a volumetric detection zone
Operation:
- The detector uses an opto-electronic module that senses IR light.
- It triggers an alarm by opening a relay contact, and it features an anti-sabotage zone.
Key Specifications:
- Detection Range: Approximately 39 ft (12 m)
- Field of View: 90°
- Recommended Installation Height: ~8.2 ft (2.5 m)
- Power Supply Voltage: 8–15 V
- Current Consumption: 12 mA
- Operating Temperature Range: –22°F to +122°F (–30°C to +50°C)
Recommendations:
Astra-5A is a reliable detector with a large detection area, ideal for corner installations where its sloped housing fits naturally. No mounting bracket is needed, and the IR module’s flexible positioning allows for fine-tuning of the detection zone. This model is especially suitable for unheated spaces. Users have reported long-term satisfaction with its performance.
Astra-5B
Type: Passive IR Detector with a surface (curtain) detection zone
Operation:
- Similar to the 5A, it activates via relay contact when IR beam intensity decreases due to smoke or obstruction.
- Includes an anti-sabotage feature.
Key Specifications:
- Detection Range: Approximately 33 ft (10 m)
- Field of View: 10° (narrow "curtain" detection)
- Recommended Installation Height: ~8.2 ft (2.5 m)
- Power Supply Voltage: 8–15 V
- Current Consumption: 12 mA
- Operating Temperature Range: –22°F to +122°F (–30°C to +50°C)
Recommendations:
The main difference from the 5A is the lens type, which provides a narrow detection “curtain” ideal for monitoring doorways or passageways. However, when installed on a sloping surface, a small “blind spot” may occur, so careful placement is essential. Its relatively lower price was once a key advantage, though careful consideration of installation location is recommended.
Astra-5V
Type: Passive IR Detector with a linear detection zone ("beam")
Operation:
- Works on the same principle, but with a linear IR beam for precise detection.
- Uses a relay to trigger an alarm and includes an anti-sabotage feature.
Key Specifications:
- Detection Range: Approximately 65.6 ft (20 m)
- Field of View: 7°
- Recommended Installation Height: ~8.2 ft (2.5 m)
- Power Supply Voltage: 8–15 V
- Current Consumption: 12 mA
- Operating Temperature Range: –22°F to +122°F (–30°C to +50°C)
Recommendations:
Astra-5V is well-suited for corridors with multiple room entrances, as its narrow beam covers up to 65 ft. The underlying circuitry and housing remain consistent with the other models; only the lens differs, and the lenses are interchangeable. This model offers excellent long-distance detection.
Astra-515 Series
Astra-515A
Type: Passive IR Detector with a volumetric detection zone
Operation:
- Activates the alarm by opening relay contacts.
- Note: Lacks an anti-sabotage zone.
Key Specifications:
- Detection Range: Approximately 33 ft (10 m)
- Field of View: 90°
- Recommended Installation Height: ~8.2 ft (2.5 m)
- Power Supply Voltage: 8–15 V
- Current Consumption: 15 mA
- Operating Temperature Range: 32°F to +122°F (0°C to +50°C)
Recommendations:
Astra-515A is a more budget-friendly alternative to the Astra-5 series, though it offers a shorter detection range. It’s not recommended for colder environments. A mounting bracket is required for angled installations. This option is solid if you can work within its limitations.
Astra-515B
Type: Passive IR Detector with a surface (curtain) detection zone
Operation:
- Similar in function to Astra-515A but with a narrow detection zone.
- Note: Lacks an anti-sabotage zone.
Key Specifications:
- Detection Range: Approximately 33 ft (10 m)
- Field of View: 7°
- Recommended Installation Height: ~8.2 ft (2.5 m)
- Power Supply Voltage: 8–15 V
- Current Consumption: 15 mA
- Operating Temperature Range: 32°F to +122°F (0°C to +50°C)
Recommendations:
This model shares the same core characteristics as Astra-515A except for the detection zone. It’s essentially interchangeable with the 515A, provided the application matches the narrower detection needs.
Astra-531
Type: Passive IR Detector (Astra-531 IR) with a surface (curtain) detection zone
Operation:
- Triggers an alarm by opening relay contacts.
- Designed for applications such as door and gate monitoring.
Key Specifications:
- Detection Range: Approximately 16.4 ft (5 m)
- Field of View: 30°
- Recommended Installation Height: ~16.4 ft (5 m)
- Power Supply Voltage: 8–15 V
- Current Consumption: 18 mA
- Operating Temperature Range: –4°F to +122°F (–20°C to +50°C)
Recommendations:
Astra-531 offers a unique design, best used for monitoring access points like doors and gates. Ceiling installation provides optimal coverage, but its limited range and higher cost should be considered.
Astra-7 Series (A & B)
Type: Passive IR Detector with a volumetric detection zone
Operation:
- Installed on the ceiling; triggers alarms by opening relay contacts.
Key Specifications (Astra-7 Models):
| Model | Detection Diameter | Recommended Height | Power Supply Voltage | Current Consumption | Operating Temp Range |
|---|---|---|---|---|---|
| Astra-7A | ~29.5 ft (9 m) | ~11.8 ft (3.6 m) | 8–15 V | 12 mA | –22°F to +122°F (–30°C to +50°C) |
| Astra-7B | ~42 ft (13 m) | ~16.4 ft (5 m) | 8–15 V | 12 mA | –22°F to +122°F (–30°C to +50°C) |
Recommendations:
Ceiling-mounted Astra-7 detectors are ideal for large rooms with many potential blind spots, such as open-plan offices. Their detection diameter is specified for the recommended mounting height; installing them lower will reduce coverage. They are particularly effective in environments where extensive monitoring is required.
Final Thoughts
The Astra series of opto-electronic IR detectors by Teko offers a wide range of options to suit different indoor security applications. Whether you need a device for broad volumetric detection or a narrow “curtain” type for specific access control, the Astra line delivers reliable performance. Although some models may carry a higher price tag, the brand reputation and consistent performance make them a worthwhile investment.
For more in-depth reviews and recommendations on security devices, visit safsale.com. Our expert insights help you select the right equipment to enhance safety and efficiency in your home or business. Stay secure with trusted technology! 🔒📹✨