SIMPLISAFE 3SI9Z Sensor

( Brand: Simplisafe ), ( Manufacturer Part Number: 3SI9Z ), ( Type: Door Sensor )

Review SIMPLISAFE 1st Generation Entry Sensor

The SimpliSafe 3SI-9Z Contact Sensor is a versatile and reliable security device designed to monitor doors and windows in your home or business. This contact sensor is an essential component of the SimpliSafe wireless security system, which allows for easy and effective home security without the need for professional installation or expensive monthly contracts.

The 3SI-9Z Contact Sensor is a sleek and unobtrusive device, measuring approximately 2.4 inches long, 1.6 inches wide, and 0.5 inches thick. It boasts a modern, white design that blends seamlessly into any environment. The sensor is battery-operated, with a long-lasting, replaceable CR2 battery that provides up to 5 years of operation.

The primary function of the 3SI-9Z Contact Sensor is to detect when a door or window has been opened or closed. The sensor consists of two parts: a magnet and a sensor plate. When the magnet and sensor plate are in close proximity, the sensor is closed, and the security system is disarmed. When the door or window is opened, the magnet separates from the sensor plate, triggering an alarm signal that is transmitted wirelessly to the SimpliSafe base station.

The 3SI-9Z Contact Sensor is not only designed to detect intrusions but also to provide added convenience. It features a "Stay Open" mode, which allows the sensor to remain in the open position for up to 30 seconds without triggering an alarm. This feature is particularly useful for doors that are frequently used, such as garage doors or entry doors, and allows for easy access without the need to disarm the entire security system.

The installation process for the 3SI-9Z Contact Sensor is quick and straightforward. The sensor can be easily mounted on doors or windows using the included 3M adhesive strips or screws. Once installed, the sensor is wirelessly synced with the SimpliSafe base station, which takes only a few minutes.

The SimpliSafe 3SI-9Z Contact Sensor is a high-performance and cost-effective security solution for homeowners and business owners alike. It offers peace of mind, convenience, and reliability, making it an essential addition to any security system. With its sleek design, long battery life, and easy installation, the 3SI-9Z Contact Sensor is an ideal choice for securing your home or business.

The SimpliSafe 345 MHz Sensor, model number 3SI-9Z, is a wireless glass break and motion detector designed for use with the SimpliSafe home security system. Here are some potential pros and cons of purchasing this sensor:

1. Versatility: The 3SI-9Z sensor can detect both glass breakage and motion, making it a multi-functional device that can help secure different areas of your home.

2. Wireless: As a wireless sensor, it is easy to install and does not require any hardwiring, making it a convenient option for those who prefer DIY installation or do not want to deal with the hassle of professional installation.

3. Battery-powered: The sensor runs on a battery, which can last up to five years, providing peace of mind and reducing the need for frequent battery replacements.

4. Integration with other devices: The 3SI-9Z sensor is compatible with other SimpliSafe devices, such as sirens, keypads, and cameras, allowing for a more comprehensive home security system.

1. Limited range: The wireless sensor has a limited range of up to 100 feet, which may not be sufficient for larger homes or buildings with thick walls or other obstructions.

2. Sensitivity customization: Some users have reported that the sensor's sensitivity levels cannot be easily adjusted, which could lead to false alarms or missed detections.

3. Limited compatibility with other systems: While the 3SI-9Z sensor works with the SimpliSafe system, it may not be compatible with other home security systems, which could limit its versatility for those who do not use SimpliSafe.

In conclusion, the SimpliSafe 345 MHz Sensor (3SI-9Z) offers convenience, versatility, and long battery life, making it a valuable addition to a SimpliSafe home security system. However, its limited range and lack of customization options could be potential drawbacks for some users. Ultimately, the decision to purchase this sensor depends on your specific home security needs and preferences. If you value ease of installation, multi-functionality, and long battery life, the 3SI-9Z sensor could be a good choice for you. However, if you require a longer detection range or more customization options, you may want to consider other sensors or systems.

Details:

Sensor # 3SI9Z. Specifically designed for home surveillance, this model 3SI9Z helps detect when a door is opened or closed, adding an extra layer of security to your smart system. With reliable performance and easy installation, this entry sensor from SimpliSafe is a valuable addition to your home security setup.

part #: 3si9z price

• $13.31

specifications secimotions:

• brand: Simplisafe
• mpn: 3si9z
• type: Door Sensor

payments secimotions:

• other
• credit card: Diners-club
• wallet: Paypal

offer secimotions:

• options: Ship-to-home
• sold: 0
• started: November 8, 2025
• availability: In Stock
• quantity: 1

general secimotions:

• Surveillance Smart Home Electronics > Home Surveillance > Sensors Motion Detectors
• condition: Open box

shipping secimotions:

• transit: 6-10 Days
• class: Standard
• carrier: USPS
• cost: $5.24
• type: Calculated
• service: USPS Ground Advantage

seller secimotions:

• city: Clearwater, Florida
• rating: 97.6%
• # reviews: 1108

returns secimotions:

• method: Money back
• policy: Returns Accepted
• paid by: Buyer
• time: 30 Days

Simplisafe 3SI9Z Is Similar To:

• Simplisafe 815017029612 Entry Door window Sensor Es3 White (48.1% similar) ...(May 16th, 2024)
• Simplisafe Es1000 Lot Of 6 Door window Entry Sensor (63.2% similar) Part #: Simplisafe ES1000 for sale...(May 16th, 2024)
• Simplisafe 843261112101 Motion Sensor Ms3 For 3 Ss3 Gen Factory Sealed (43.1% similar) ...(May 16th, 2024)
• Simplisafe 815017029995 Es3 Entry Door Window Sensor Magnetic White Gen 3 New Sealed Count (38.8% similar) See all pictures for details. Brand: Simplisafe. If you wear it is not new anymore and loses its value. This item is brand new...(May 17th, 2024)
• Simplisafe Ca001 Ms3 Latest Home Security Motion Sensor Gen3 System New In Box (47.5% similar) Designed to detect motion within 30 feet and has a 90 degree field of view for coverage from every corner. Then follow the steps in Simplisafe app. Simple set up - peel and stick installation, place on a shelf or can install using included hardware. Covers large rooms - with 90 degree field of...(May 17th, 2024)
• Simplisafe Ens306 6-pack Entry Sensor White New In Sealed Box (48.6% similar) Part #: Simplisafe ENS306 for sale...(May 18th, 2024)
• Simplisafe 843261112163 New Glassbreak Sensor Gb3 White Home Security System (40% similar) New Simplisafe glass break sensor GB3 white home security system. Shipped with USPS ground advantage. Condition is new...(May 20th, 2024)
• Security Sensor Spacers 691039670007 Riser Compatible With Simplisafe Diy Contact Spacer For Simplisa (24.5% similar) Solves false alarms without compromising your security system. Uneven doors, windows and or frames with riser spacer compatible Simplisafe alarm contact sensor. Peel and stick 3m custom cut adhesive for easy installation...(May 21st, 2024)
• Simplisafe 815017029643 Water Sensor White 2x Helps Catch Leaks Early Factory Sealed (35.9% similar) ...(May 24th, 2024)
• Simplisafe Mos301 Smart Indoor Motion Sensor (62.2% similar) 90 field of vision, giving you a full range coverage when placed in corner. Your dogs and cat under 50 lbs. Ready to work right out of the box, your motion sensor comes pre-installed with batteries and adhesive. Precision-engineered and designed to detect the unique heat signature of people...(May 26th, 2024)
• Simplisafe Gb1000 Glassbreaker Detector Sensor 1st Generation Lot Of 2 (50.9% similar) Part #: Simplisafe GB1000 for sale...(May 29th, 2024)