Introduction to the Optex BXS‑ST Outdoor Curtain PIR Detector
Optex BXS‑ST Outdoor Curtain PIR Detectoris a purpose‑built perimeter PIR sensor designed to deliver focused curtain‑style detection for windows, fences, and low‑mount perimeter lines. With a total coverage of up to 24 m (12 m per side) and dual independent alarm outputs, the BXS‑ST is aimed at customers who need reliable, zone‑specific detection and simple integration with CCTV or alarm panels. It combines four PIR elements, SMDA (Super Multidimensional Analysis) logic and selectable sensitivity ranges to reduce nuisance alarms from wind, vegetation or small animals while preserving dependable detection of human intruders.
Key features at a glance
- Coverage up to 24 m total (12 m per side) with selectable detection distances.
- Four‑PIR curtain technology creating two independent left/right beams and four internal zones.
- SMDA + size/AND logic for advanced false‑alarm reduction; “Extreme high” mode for small temperature differentials.
- Individual left/right alarm outputs for zone‑based alarm or camera triggering plus tamper/back‑tamper output.
- Weather resistant IP55 housing designed for low‑mount outdoor deployment.
- Hardwired 9.5–18 V DC power input; automatic walk test mode to simplify commissioning.
Detailed specifications and benefits
The BXS‑ST is engineered with practical installation and reliable field performance in mind. Below are the most relevant technical details and the benefits they deliver in typical deployments.
- Detection method: Passive infrared (PIR)
- Coverage / distance: 24 m total (12 m per side)
- Adjustable ranges: 2.5, 3.5, 6.0, 8.5, 12.0 m
- Zones: 4 zones (2 per side)
- Detectable speed: Approx. 0.3–2.0 m/s
- Sensitivity: Normal: 2.0°C (at 0.6 m/s); Extreme high: 1.0°C (at 0.6 m/s)
- Power input: 9.5–18 V DC
- Current draw: Approx. 31 mA (max at 12 V DC)
- Outputs: Individual left/right alarm outputs; tamper/back‑tamper output
- Logic: SMDA (Super Multidimensional Analysis) + size/AND
- Walk test: Automatic walk test mode
- Environmental rating: IP55 (outdoor use)
- Mounting: Low‑mount perimeter; selectable 0° to 3° wall offset
- Dimensions (approx.): 199.7 × 92.8 × 52.7 mm
- Weight (approx.): ≈ 430 g
- Four‑PIR curtain technology: The BXS‑ST uses two PIR elements per side to form narrow, curtain‑like detection beams. This design is ideal for protecting openings (windows, narrow corridors) and creating focused trip lines without the broad coverage of area detectors.
- Dual independent outputs: Left and right alarms can trigger separate cameras or panel zones, enabling visual verification and targeted responses—especially useful for long façades or multi‑entry perimeters.
- Adjustable ranges and sensitivity modes: Installers can tune detection distance to match mounting height and environmental conditions, while the SMDA and size/AND logic lower nuisance alarms from foliage, moving shadows or small animals.
- IP55 weatherproofing and low‑mount design: Built to withstand outdoor conditions while mounted close to walls or fences; selectable mounting offset reduces blind spots near the wall.
- Low current draw and common DC power range: Keeps integration simple with most alarm and CCTV power supplies, and reduces ongoing power demand for battery‑backed systems.
Use cases and scenarios where the BXS‑ST excels
The BXS‑ST suits a variety of perimeter security roles. Its curtain detection pattern and zone outputs make it particularly effective in the following scenarios:
Mounted beneath windows or along building façades, the narrow curtain beams detect a human approach while minimizing coverage of surrounding vegetation or street traffic. Independent left/right outputs allow installers to separate zones by window bank or doorway, and to trigger specific CCTV presets or recordings.
For fences, low walls or hedgerows, the BXS‑ST provides focused trip‑line detection that picks up on an intruder attempting to climb or cross the barrier. The selectable ranges let you set shorter coverage where objects or public access are nearby, or extend the beams to 12 m per side where needed.
Integrating the BXS‑ST with a camera system enables event‑based recording and faster verification. Because the detector can output separate left/right alarms, an operator or VMS can call a specific camera preset or mark a camera timeline precisely where motion occurred.
From small businesses that need perimeter protection to larger facilities that require zoned detection along long perimeters, the BXS‑ST is scalable: multiple units can be positioned to cover extended lengths while keeping false alarm rates low thanks to SMDA logic.
Comparisons with similar products on the market
When choosing a curtain‑style PIR detector, installers typically weigh detection reliability, false alarm resistance, output flexibility and weatherproofing. Here’s how the BXS‑ST compares on those criteria in general terms.
Many basic curtain PIRs use a single detection output and fewer sensing elements. The BXS‑ST’s four‑PIR arrangement and dual outputs provide better discrimination across a wider span and let you split zones for targeted responses—advantages in installations where a single alarm relay isn’t enough.
Microwave + PIR hybrids can offer extended range and penetration of environmental clutter, but they are more susceptible to false alarms from moving foliage or large animals if not carefully tuned. The BXS‑ST’s SMDA and size/AND logic focus on processing PIR signals to reduce nuisance alarms without the regulatory complexity and possible RF interference issues of microwave elements.
Active IR barriers provide consistent detection over long spans and precise trip lines, but they require alignment of emitter/receiver pairs and may be more expensive. The BXS‑ST gives a balance of cost, ease of installation (single low‑mount unit) and reliable human detection for many perimeter applications where a full active IR barrier is not warranted.
Customer feedback and typical reviews
Direct customer reviews for a specific model may vary by region and installer experience. Below are representative, anonymised comments reflecting common themes reported by security professionals and end users who choose curtain‑style PIRs like the BXS‑ST:
- "We installed the BXS‑ST along a shopfront and the independent outputs let us link each side to separate camera presets — fewer false alarms and faster verification."
- "Tuned correctly, the SMDA logic made a noticeable difference with nearby trees. We still get occasional wildlife triggers, but far fewer nuisance calls than with older detectors."
- "Compact, easy to mount under the window sills. The selectable range settings were handy when fitting different building elevations."
- "Power and wiring are straightforward. Make sure to follow the datasheet for walk test and tamper wiring during commissioning."
These sample comments reflect practical benefits and considerations installers typically mention: improved zone control, better nuisance alarm handling, and straightforward installation. For verified reviews, check distributor or reseller listings and ask for site references from installers who have used the model in similar environments.
Installation notes, pricing and compliance
The BXS‑ST is hardwired and accepts 9.5–18 V DC; installers should follow the official datasheet and installation manual for wiring diagrams, precise mounting dimensions and commissioning procedures. The unit is IP55 rated for outdoor use and has a tamper/back‑tamper output for enclosure security.
Suggested retail price: 129.00 (currency depends on region). Cost price (for reference): 84.89. Warranty information was not provided here; confirm manufacturer warranty and approvals (CE/UKCA or regional certifications) with the supplier or Optex distributor before purchase and installation.
Conclusion: why choose the Optex BXS‑ST
The Optex BXS‑ST Outdoor Curtain PIR Detector is a focused, practical solution for perimeter and window protection where narrow trip lines, zone separation and false‑alarm resistance are priorities. Its four‑PIR curtain design, selectable ranges and SMDA + size/AND logic deliver a reliable detection profile, while independent left/right outputs enable targeted alarm handling and camera integration. Weatherproofing and low‑mount adaptability make it suitable for both residential and commercial sites where a compact, low‑cost yet capable detector is required.
For installers and security managers seeking a balance of performance, ease of installation and reduced nuisance alarms, the BXS‑ST is a compelling option. As always, verify installation best practices, test on site using the automatic walk test feature, and confirm local approvals and warranty details with the supplier prior to deployment.
