Microwave Vs Infrared Activation Sensors – What’s the Difference?

Post by: admin - October 24, 2019
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When it comes to automatic door sensors, there are two primary options that you can choose from: microwave sensors and infrared sensors.   But what exactly is the difference between these two sensors? And which would make a better door sensor?

These two types of motion sensors are the most common ones you’ll find in commercial buildings, and it’s not hard to figure out why– both work efficiently at detecting moving people and objects, and immediately opening automatic doors.

To answer these questions, let us first break down how each one works.

The Infrared Sensor

The infrared sensor works by measuring the infrared light radiating from the objects in its field of view. All objects with a temperature above absolute zero emit heat energy in the form of radiation. This radiation cannot be seen by the human eye, but can be detected by electronic devices like the infrared sensor.

The infrared sensor conducts an analysis of a room or surrounding areas, and looks for a change in infrared energy. Should it detect a change, such as the presence of a moving person in the proximity, it will emit a pulse activating the automatic door sensors, which in turn prompts the doors to open.

Infrared sensors are also known as Passive Infrared Sensors. ‘Passive’ here refers to the fact that these sensors do not emit or generate energy for detection purposes; they work simply by detecting infrared radiation emitted or reflected from objects.

The Microwave Sensor

The microwave movement sensor works quite differently to the infrared sensor. It applies the Doppler effect in that it sends out microwave signals and measures the length of time it takes for these signals to bounce off of surrounding objects and return to it. This echo time is what it uses to calculate the distance of stationary objects around it. It first establishes a baseline room or area analysis to detect the current distance of all surrounding objects. When something comes into the detection area thereby interrupting the microwave signals and altering the echo time, it perceives this as a change in distance from the object and this sets off its trigger.

The microwave sensor works much like a RADAR or SONAR system, sending out signals to measure its distance from objects. But the microwave sensor can also detect motion through wood, plastic, glass and most other construction materials except metal. Metal acts as a shield, creating dead zones behind them. This can be both an advantage and disadvantage to the microwave sensor.

Now that we know what the difference is between the two, it’s time to answer the question: which is better? The answer however isn’t clear cut:

Comparison

  • Microwave sensors are highly sensitive and are able to detect motion even through thin walls. In this sense, they are more powerful than infrared sensors. But because of their sensitivity, they can easily get triggered erroneously or trigger false alarms. They sense movement in terms of speed and size, and so they can be triggered by things that normally shouldn’t trigger a sensor like trees blowing in the wind, moving drapery or movement beyond walls. Even fluorescent lighting, which emits detectable light particles, can activate the sensor and trigger it.

  • Infrared sensors on the other hand, are less prone to such false alarms. But since they detect movement through heat and light, their performance can be affected by the ambient temperature. Often their sensitivity is compromised when the ambient temperature reaches beyond 35℃. The opposite happens in very cold temperatures wherein they become extremely sensitive. Microwave sensors are more stable in this sense, operating properly even at temperatures as low as -20℃ and as high as 45℃.

  • Since infrared sensors detect movement through body heat – they are ideal for situations that require defined detection, such as in front of a doorway or down a walkway. But they must be installed in just the right position to provide effective coverage.

  • Microwave sensors are great for just about any environment. They can provide fine motion-sensing whether in high heat, a large indoor commercial area, or large outdoor area that may be awkwardly shaped. This makes them one of the most versatile of sensors.

  • Microwave sensors often have a longer lifespan than infrared sensors. They’re also one of the oldest and most relied on sensor technologies, but can be more expensive to run since they require more power.

  • Since microwave sensors work at intervals – meaning they first emit signals and then receive them- it’s possible that someone or something moving fast enough may not be detected.

So which sensor would be better for your automatic door? Generally, infrared sensors are more suitable for smaller, more compact entryways and well-controlled, indoor spaces, whereas microwave ones are good for large areas. But who says you need to choose anyway?

With Rotech’s selection of commercial automatic door sensors, you can get both infrared and microwave technology in one! We also have a great selection of microwave only and infrared only door sensors. Take a look at our product range today!

6 Benefits of Covering your Business Entry Points with Door Activation Sensors

Post by: admin - August 13, 2019
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Your front doors are the main entry points through which customers or clients enter your business premises. They’re one of the first things people see of your business and as such, should not only be efficient but present a positive image of your business. So how can you make your business entry points welcoming and impressive, and secure at the same time?

THE ANSWER: door activation sensors.

Door sensors give your business an impressive entry point through the efficient control of automatic doors, as well as keep your entry points secure. Through an active infrared sensor, microwave sensor or both, doors automatically open and close for customers or clients, and stay locked when it is no longer operating hours.

Such capabilities are certainly impressive, but these are by no means the only benefits of having an automatic sliding door – here are several others:

1. Easier entrance and exit monitoring

With door sensors as part of your overall business security system, you can better monitor the people coming in and out of your premises. Persons or objects need to be standing within a detection area around entry points in order to trigger sensors and consequently open doors. This guarantees a moment where people can be clearly seen coming in and out of a premises through entry point CCTV cameras.

2. Remote control

Many automatic door sensors have remote controls, which allow you to conveniently set sensor parameters remotely.

3. Energy savings

You might think that having automatic door sensors will only add to your energy costs, but they can actually help lessen them. Indoor heating and cooling systems usually consume the most energy within a building. Having constantly open doors can significantly increase the energy needed for these systems to maintain indoor temperatures.

By installing automatic door sensors, you limit the amount of time that doors remain open, thereby preserving indoor temperature and conserving the energy needed to maintain it.

Many door activation sensors are also very energy efficient in themselves, consuming very little energy to operate efficiently. Some can even distinguish between pedestrian or vehicular traffic and open doors or entryways only up to the size of the opening required, further increasing energy efficiency.

4. Easy entrance and exit for materials and supplies

If your business or facility often receives large deliveries of materials and supplies; or if your business needs to move goods in bulk regularly, door activation sensors are essential. These will allow easy entrance and exit of large, bulky items.

5. Easy entrance for people with disabilities

This is especially necessary for hospitals and other medical facilities where persons are wheeled in on wheelchairs and stretchers, or have disabilities and require assistance when going through doors. Door activation sensors make it so that these people don’t need to exert any effort to go through doors.

6. Lesser maintenance and assorted costs

Because doors or access points need not be touched when door activation sensors are present, damage to doors or sensors due to pedestrian use or direct contact is minimised or even eliminated. This means you spend less time and money on maintenance, and they last longer than most other types of entry systems.

With all these benefits, door activation sensors give you great value for money and are a definite must for every business premises. Make sure your business doesn’t miss out on these benefits– enquire about our range of commercial door activation sensors now by calling (07) 3205 1123.

SAFEPASS Sensors “Waving” Good-bye to Contamination

Post by: admin - August 2, 2018
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Wave but Don’t Touch!    Eliminate cross-contamination and reduce the spread of bacteria, diseases and infections.   Advanced “touchless” door activation sensors are an effective solution to safeguarding facilities, employees, customers and patients against unhygienic practices. 

Rotech’s SAFEPASS ClearWave and J-Wave touchless door activation sensors incorporate the latest microwave and infrared technologies into a sleek slim line design that makes mounting a breeze.

ClearWave Touchless Door

SAFEPASS ClearWave Door Activation Sensor
hygienic, touchless, microwave technology, flush mounted, sleek design, water resistant, versatile 

This non-touch door activation switch is used to maintain sterile environments and features an adjustable touchless range from 5-40 cm.

Designed for installations where hygiene is paramount such as hospitals, operating theatres, pharmaceutical facilities, clean rooms, food processing plants and chemical industry applications.

SAFEPASS J-Wave Door Activation Sensor
germ-free, touchless, active infrared technology, jamb style mounting, tough polycarbonate  

A non-touch door activation switch with a detection distance of up to 30 cm.  Its low profile design facilitates a tidy installation on narrow door frames or guide rails.

Able to detect very fast hand movements in front of the switch body and is illuminated by an LED so it is easily located in dimly lit environments. Designed to reduce the spread of germs and improve accessibility in hospitals, healthcare, industrial, retail and commercial settings.

 Use SafePass Sensors with confidence

    • Minimise return site visits – Fast reaction times, consistent, reliable sensor performance in a wide range of installation and climatic environments.
    • Reduce Building Energy Loss – Accurately adjustable detection area reduces false door activation cutting building energy losses by as much as 15%.
    • Certification – All SafePass Sensors are TUV certified to DIN18650 Standards.
    • Designed for Easy Install – Installation instructions are clearly printed on the sensor body.
    • Simple dip switch settings, standard connections across all products, enables commissioning in a matter of minutes.
    • Warranty – All active infrared sensors are backed by a 5 Year manufacturing warranty.
    • Manufactured in Japan since 1968 – globally recognised as a market leader in the design and manufacture of sensors.

Our range of microwave and infrared advanced technology door activation sensors has all your business entry points covered.  Call us to find out which one will best suit your needs.

SafePass Automatic “Door” Learn Sensors

Post by: admin - July 11, 2018
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Many people pass through automatic sliding doors in office buildings, shopping centres, hospitals, schools, airports etc every day.  Motion and infrared sensors play a critical role in ensuring automatic sliding doors are efficiently and safely while allowing smooth flowing convenient pedestrian access in and out of buildings.

Advances in direction detection and infrared technologies continue to enable better solutions for the safe operation of all kinds of automatic doors operating in a wide variety of environments.  Our two active infrared sensor products; the SSR-3 combined technology sensor and the HR100-CT uni-directional active infrared sensor, use unique innovative “door learn technology” to provide unmatched pedestrian safety.

What is “Door Learn Technology” and how does it work?

The unique ability of the “Door Learn” function to memorize door motion and for sensors to look back inside the sliding door leaf allows the door operation to be ignored while anything in the doorway will be detected.  The result – an unparalleled level of pedestrian safety.

Active Infrared sensors transmit and measure the reflection levels of infrared light. They have a high immunity to the negative effects of external influences such as reflections, sunlight and artificial light. These sensors are easy to install and adjust and can detect motion and static presence.

  • On set up the “Door Learn” function runs. Sensors take a snapshot of the reflection levels from the ground.
  • The infrared safety curtain is focused both in front of as well as inside the moving door leaf.
  • Three 3 rows of light are changed from motion detection to presence.
  • Now any changes in the properties of the reflected wave will indicate that a person or object is in the detection area and cause the sensor relay to activate and the door to open.

SAFEPASS SSR-3 Infrared & Microwave Automatic Door Sensor 
With “Door Learn” and uni-directional detecting technology this innovative energy saving sensor can be mounted at heights of up to 3.2m. 

A large adjustable detection zone of 4m wide x 4m deep ensures timely door opening for doors approached by shopping trolleys or fast-moving traffic. The EN16005 compliant monitored safety system is also available with an emergency escape route versions.

SAFEPASS HR100-CT Uni-directional Detection Automatic Door Sensor
Using advanced infrared technology this pioneering super sensor offers automatic sliding door activation and unprecedented safety at mounting heights of up to 3m.

The HR100-CT’s easily adjustable detection area eliminates false door openings in busy urban environments. The monitored safety system features dual relay outputs. This ability to adjust the door activation and pedestrian safety detection zones independently makes it the ideal sensor for every sliding door installation.

Use SafePass Sensors with confidence

  • Minimise return site visits – Fast reaction times, consistent, reliable sensor performance in a wide range of installation and climatic environments.
  • Reduce Building Energy Loss – Accurately adjustable detection area reduces false door activation cutting building energy losses by as much as 15%.
  • Certification – All SafePass Sensors are TUV certified to DIN18650 Standards.
  • Designed for Easy Install – Installation instructions are clearly printed on the sensor body.
  • Simple dip switch settings, standard connections across all products, enables commissioning in a matter of minutes.
  • Warranty – All active infrared sensors are backed by a 5 Year manufacturing warranty.
  • Manufactured in Japan since 1968 – globally recognised as a market leader in the design and manufacture of sensors.

Our range of microwave and infrared advanced technology door activation sensors has all your business entry points covered.  Call us to find out which one will best suit your needs.

Making Sense of Sensors – Domino 1100

Post by: admin - June 19, 2018
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SAFEPASS HIGH MOUNT INDUSTRIAL DOOR SENSOR

Industrial manufacturers, warehouses, distribution centres and commercial operations have been moving away from older slow, rigid doors to high-speed doors in an effort to increase productivity and energy efficiency.

But at what cost?  The quest for high-speed high-cycle automation also comes with added safety risks that increased operating speeds can bring to a door opening.  Fortunately, these days, most automatic doors use motion detection sensors to manage safety and security in vulnerable areas.

The Domino 1100 Microwave Motion Sensor solution – designed for large high-speed industrial doors, vehicle gates and barriers, vehicle detection, loading docks or any other industrial application where motion detection is required.

SMART – Increasing Pedestrian Safety

The Domino 1100 combines uni-directional detecting technology with intelligent software to differentiate between pedestrians and vehicles.

The ability to identify a pedestrian versus a vehicle allows for different door operation responses, such as partial or full door opening, to be set according to the type of traffic approaching the door.

The ability to configure the Domino 110 to detect different types of activity means the sensor can be used to separate pedestrians and vehicles. Setting the unit to ignore pedestrian traffic while still detecting vehicular traffic forces pedestrians to use a safer side access pedestrian door.

Detection mode is selectable between approach-only or depart-only motion and can also distinguish between cross-traffic and approaching traffic.

SENSITIVE – Fast Moving Vehicle Detection

Featuring microwave sensor technology the Domino 1100 can detect larger objects, such as forklift trucks, up to 60 feet away.

The maximum pattern size of the Domino 1100 is approximately 18 ft. wide and 60 ft. from the unit and is easily adjustable via range potentiometer on the printed circuit board.  Uni-directional detecting technology and a large detection area of 5m wide x 8m deep makes the Domino 1100 ideal for the timely detection of fast-moving vehicles.

The mounting height of conventional sensors is around 3-4 metres but the Domino 1100 can be installed at a higher mounting height of up to 7 metres – perfect for taller industrial doors.

SOPHISTICATED – Microwave Technology

Microwave sensors operate by registering and comparing the frequency of transmitted and reflected signals. People and objects cause disparities between the emitted and received frequencies as they move through the detection zone, activating the sensor relay and causing the door to open.

Microwave detectors are motion sensors and can be used in virtually any environment, including those that are not otherwise hospitable to other sensors, making them one of the most versatile types of sensor systems. The Domino 1100 is unaffected by air motion, change in temperature, humidity, color or background variations.

The Domino 1100 is able to be programmed to reduce the number of false door activations without reducing the number of correct positives – improving accuracy, energy losses and ease of use.

Use SafePass Sensors with confidence

  • Reliable – Fast reaction times, consistent, reliable sensor performance in a wide range of installation and climatic environments.
  • Designed for Easy Install – Instructions are printed on the sensor body. Simple dip switch settings, standard connections, enables commissioning in a matter of minutes.
  • Reduce Building Energy Loss – Accurately adjustable detection area reduces false door activation cutting building energy losses by as much as 15%.
  • Certification – All SafePass Sensors are TUV certified to DIN18650 Standards.
  • Warranty – All active infrared sensors are backed by a 5 Year manufacturing warranty.
  • Manufactured in Japan since 1968 – globally recognised as a market leader in the design and manufacture of sensors.

Contact us if you want to know more about the SafePass Domino 110 or any of our other sensors.