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Smart Security Sensor Probes

Group of sensors designed for Smart Security applications

Libelium Waspmote Smart Security model is designed to monitor security parameters such as perimeter access control, liquid presence detection and doors and windows openings. Each model has six dedicated sockets to connect sensor probes. Each sensor socket is identified by a letter from A to F and each sensor probe should go in a dedicated socket, due to each sensor has different power requirements (current and voltage levels), dedicated circuitry, etc

Libelium provides many different sensor probes depending on what is going to be measured. For Smart Security model following sensor probes can be used.

Temperature and Humidity Probe

Sensor specifications (SHT75)
  • Measurement range: -40ºC ~ +123.8ºC
  • Resolution: 0.04ºC (minimum), 0.01ºC (typical)
  • Accuracy: ±0.4ºC (range 0ºC ~ +70ºC), ±4ºC (range -40 ~ +125ºC)
  • Repeatability: ±0.1ºC
  • Response time (minimum): 5 seconds (63% of the response)
  • Response time (maximum): 30 seconds (63% of the response)
  • Humidity:
  • Measurement range: 0 ~ 100%RH
  • Resolution: 0.4%RH (minimum), 0.05%RH (typical)
  • Accuracy: ±1.8%RH
  • Repeatability: ±0.1%RH
  • Response time: 8 seconds

The SHT75 sensor by Sensirion incorporates a capacitive sensor for environmental relative humidity and a band gap sensor for environmental temperature in the same package that permit to measure accurately both parameters. The sensor output is read through two wires following a protocol similar to the I2C bus (Inter- Integrated Circuit Bus) implemented in the library of the board, returning the temperature value in Celsius degree (ºC) and the humidity value in relative humidity percentage (%RH).

Liquid Flow Sensor Probes

Sensor specifications (YF-S401, FS300A and YF-G1)
Water Flow Small, YF-S401:
  • Flow rate: 0.3 ~ 6L/Min
  • Working voltage: +3.3V ~ +24V
  • Working temperature: 0ºC ~ 80ºC
  • Pipe connection: 1/8”
  • Accuracy: ±3%
  • Max rated current: 15mA (DC 5V)
Water Flow Medium, FS300A:
  • Flow rate: 1 ~ 60L/Min
  • Working voltage: +5V ~ +24V
  • Working temperature: 0ºC ~ 80ºC
  • Pipe connection: 3/4”
  • Accuracy: ±3%
  • Max rated current: 15mA (DC 5V)
Water Flow Large, YF-G1:
  • Flow rate: 1 ~ 100L/Min
  • Working voltage: +3.3V ~ +24V
  • Working temperature: 0ºC ~ 80ºC
  • Pipe connection: 1”
  • Accuracy: ±3%
  • Max rated current: 15mA (DC 5V)

The liquid flow sensors output a signal that consists of a series of digital pulses whose frequency is proportional to the flow rate of the liquid through the sensor. That digital signal, whose frequency is in the range between 0Hz and 100Hz, is directly read through one of the digital input/output pins of the microcontroller.

Presence sensor probe

Sensor specifications (PIR)
  • Height: 22mm
  • Diameter: 20.2mm
  • Consumption: 170µA
  • Range of detection: 12m
  • Circuit Stability Time: 30seconds

The PIR sensor (Passive Infra-Red) is a pyroelectric sensor mainly consisting of an infra-red receiver and a focusing lens that bases its operation on the monitoring of the variations in the levels of reception of detected infra-reds, reflecting this movement by setting its output signal high. The 10µm spectrum corresponds to the radiation of heat from the majority of mammals as they emit temperatures around 36°C.

Luminosity sensor probe

Sensor specifications (LDR)
  • Resistance in darkness: 20MO
  • Resistance in light (10lux): 5 ~ 20kO
  • Spectral range: 400 ~ 700nm
  • Operating temperature: -30ºC ~ +75ºC

This is a resistive sensor whose conductivity varies depending on the intensity of light received on its photosensitive part. The measurable spectral range (400nm – 700nm) coincides with the human visible spectrum so it can be used to detect light/ darkness in the same way that a human eye would detect it.

Liquid Level sensor probe

Sensor specifications (PTFA3415, PTFA0100, PTFA1103)
  • Measurement Level: Horizontal
  • Liquids: Water
  • Material (box): Propylene
  • Material (float): Propylene
  • Operating Temperature: -10ºC ~ +80ºC
  • Measurement Level: Horizontal
  • Liquids: Heavy oils and combustibles
  • Material (box): Polyamide
  • Material (float): Polyamide
  • Operating Temperature: -10ºC ~ +80ºC
  • Measurement Level: Vertical
  • Liquids: Water
  • Material (box): Propylene
  • Material (float): Propylene
  • Operating Temperature: -10ºC ~ +80ºC

There are three liquid level sensors whose operation is based on the status of a switch which can be opened and closed (depending on its placing in the container) as the level of liquid moves the float at its end. The main differences between the three sensors, regarding its use in Waspmote, are to be found in their process for placing them in the container (horizontal in the case of the PTFA3415 and PTFA0100 sensors, vertical for the PTFA1103 sensor) and in the material they are made of (the PTFA1103 and PTFA3415 sensors recommended for edible liquids and certain acids and the PTFA0100 for heavy oils and combustibles, more specific information can be found in the sensors’ manual).

Liquid Presence sensor probe (Point)

Sensor specifications
  • Maximum Switching Voltage: 100V
  • Operating temperature: +5ºC ~ +80ºC
  • Detectable liquids: Water

This sensor bases its operation on the variation in resistance between its two contacts in the presence of liquid to commute a switch reed from open to closed, commuting to open again when the liquid disappears (take care when it is used to detect liquids of high viscosity which may remain between the terminals blocking its drainage and preventing it from re-opening).

Hall Effect sensor probe

Sensor specifications
  • Length: 64mm
  • Width: 19mm
  • Thickness: 13mm
  • Maximum contact resistance (closed): 200mO
  • Minimum contact resistance (open): 100GO

This is a magnetic sensor based on the Hall effect. The sensor’s switch remains closed in the presence of a magnetic field, opening up in its absence. Together with its complementary magnet it can be used in applications of monitoring proximity or opening mechanisms.

Liquid Presence sensor probe (Line)

Sensor specifications
  • Lenght: 5 meters sensor + 2 meters jumper wire
  • Material: PE + alloy lend
  • Weight: 18g/meter
  • Pull force limit: 60kg
  • Cable diameter: 5,5mm
  • Core resistance: 3ohm/100meters
  • Maximum exposed temperature: 75ºC
  • Detectable liquids: Water

This sensor detects conductive liquids anywhere along its length. After it is installed, once the cable senses the leakage of liquids, it will triggers an alarm. The sensor cable can detects the leakage of water.

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Libelium, Plug & Sense Water flow medium Sensor

DNA Part Code: LI-9297-P
Libelium MPN: 9297-P

Libelium, Plug & Sense Presence (PIR) Sensor

DNA Part Code: LI-9212-P
Libelium MPN: 9212-P

Libelium, Plug & Sense Luminosity (LDR) Sensor

DNA Part Code: LI-9205-P
Libelium MPN: 9205-P

Libelium, Plug & Sense Water Leakage / Liquid Detection (Line) Sensor

DNA Part Code: LI-9295-P
Libelium MPN: 9295-P

Libelium, Plug & Sense Horizontal liquid level (water) Sensor

DNA Part Code: LI-9240-P
Libelium MPN: 9240-P

Libelium, Plug & Sense Hall Effect Sensor

DNA Part Code: LI-9207-P
Libelium MPN: 9207-P