Free Wireless Sensors from FreeSensors.com
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Wireless Temperature Sensor
The wireless temperature sensor uses a thermistor to accurately measure temperatures from -20°C to 85°C. Perfect for slower changing temperatures and critical applications such as facilities or rooms. User customization allows you to set the frequency of readings and the ability to set thresholds for "Alarms", "Alerts" and "FYIs".
- Accurate to +/- 1.0°C (1.8°F).
- Temperature Range of -20°C to 85°C.
- Good for slower changing temperature.
- User defined thresholds.
« Technical Specifications
- 900 MHz Operating Frequency (25 Channels)
- 300 - 500 ft. Device Range*
- Lithium Ion 3.0V Battery
- Battery Lasts Over 300,000 Transmissions
(~ 2-5 Years Depending on Settings**)
- Accurate to +/- 0.5°C (1.0°F).
- Operating temperature range: -20°C to +85°C.
- Good for slower changing temperatures.
- Small size is ideal for embedded applications.
- User defined thresholds for alerts and notifications.
Note - If external leads are needed for custom
placement, call a sales representative to
customize your order.
* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting
frequency and other variables.
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| Thermistor Specifications |
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| Thermistor Operating Range |
-40°C to 125°C |
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| Battery Operating Range |
-20°C to 85°C |
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| Accuracy @ 25°C |
+/- 1% |
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| Resistance @ 25°C |
10K ± 1% |
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| B-Constant (25°C – 50°C) |
3380 ± 1% |
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| Permissive Operating Current @ 25°C |
0.38 mA |
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| Rated Electric Power @ 25°C |
15 mW |
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| Dissipation Constant @ 25°C |
1.5mW/°C |
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| Time Constant @ 25°C |
7 sec |
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| RoHS |
Compliant |
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Wireless Temperature Sensor with 3 ft External Probe
The wireless temperature sensor uses an external sensor probe to measure temperature with more accuracy and greater thermal range. Perfect for fast changing, temperature critical applications such as coolers or heaters. User customization allows you to set the frequency of readings and the ability to set thresholds for "Alarms", "Alerts" and "FYIs".
- Accurate to +/- 1.0°C (1.8°F).
- Temperature Range of -40°C to 125°C.
- Good for fast changing temperature.
- 3 ft external probe for custom placement.
- User defined thresholds.
« Technical Specifications
- 900 MHz Operating Frequency (25 Channels)
- 300 - 500 ft. Device Range*
- Lithium Ion 3.0V Battery
- Battery Lasts Over 300,000 Transmissions
(~ 2-5 Years Depending on Settings**)
- Accurate to +/- 0.5°C (1.0°F).
- Operating temperature range: -40°C to +125°C.
- Good for slower changing temperatures.
- Small size is ideal for embedded applications.
- User defined thresholds for alerts and notifications.
Note - If external leads are needed for custom
placement, call a sales representative to
customize your order.
* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting
frequency and other variables.
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| Thermistor Specifications |
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| Thermistor Operating Range |
-40°C to 125°C |
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| Battery Operating Range |
-20°C to 85°C |
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| Accuracy @ 25°C |
+/- 1% |
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| Resistance @ 25°C |
10K ± 1% |
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| B-Constant (25°C – 50°C) |
3380 ± 1% |
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| Permissive Operating Current @ 25°C |
0.38 mA |
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| Rated Electric Power @ 25°C |
15 mW |
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| Dissipation Constant @ 25°C |
1.5mW/°C |
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| Time Constant @ 25°C |
7 sec |
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| RoHS |
Compliant |
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Wireless Water Sensor
The wireless water sensor alerts you of potential property damage that results from flooding or leaks. Place this sensor anywhere flooding or faulty plumbing could cause a problem. This sensor can also be used to detect a lack of water, allowing you to know when a container is nearing empty.
- Senses immediate pressence or non-pressence of water.
- Can be used for detection of any non-cumbustable liquid.
- Variety of lead lengths available.
- User defined thresholds.
« Technical Specifications
- 900 MHz Operating Frequency (25 Channels)
- 300 - 500 ft. Device Range*
- Lithium Ion 3.0V Battery
- Battery Lasts Over 300,000 Transmissions
(~ 2-5 Years Depending on Settings**)
- Senses immediate presence of water.
- Can also sense non-presence of water.
- Use for detection of any non-cumbustable liquid.
- Variety of lead lengths available.
- User defined thresholds.
- Product comes with standard 12in lead.
Note - If customized external leads are needed for
placement, call a sales representative to
customize your order.
* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting
frequency and other variables.
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| Water Sensor Specifications |
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| Supply Voltage |
2.0 - 3.6 V |
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| Current Consumption |
0.5 µA |
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| Operating Temperature |
[-85°C to +150°C] |
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| Absolute Maximum Ratings: |
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| Supply Voltage: |
[-0.3 to 3.9 V] |
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| Storage Temperature: |
[-50°C to +150°C]* |
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| *Core unprogrammed |
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Wireless Light Sensor
The wireless light sensor can be user calibrated for baselines of light and dark, and will provide a measurement of the percentage of light between those baselines. Alerts can then be setup for when a light threshold has been met.
- Sense the amount of light on night time walkways.
- know if the lights have been left on at your facility.
- Know when lightbulbs have blown and need to be replaced.
« Technical Specifications
- 900 MHz Operating Frequency (25 Channels)
- 300 - 500 ft. Device Range*
- Lithium Ion 3.0V Battery
- Battery Lasts Over 300,000 Transmissions
(~ 2-5 Years Depending on Settings**)
- Sense the amount of light on night time walkways.
- know if the lights have been left on at your facility.
- Know when lightbulbs have blown and need to be replaced.
* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting
frequency and other variables. |
| Phototransistor Specifications |
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| Collector Emitter Breakdown Voltage (0.1 mA) |
6 V |
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| Collector Dark Current (5 VCE) |
3 nA typ. |
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| Collector Emitter Capacitance (Vce=0, f=1MHz, E=0) |
16 pF |
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| Collector Light Current (5 VCE, 20 lx) |
5 to 24µA |
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| Collector Light Current (5 VCE,100 lx) |
75µA |
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| Angle of Half Sensitivity |
±50 degrees |
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| Wavelength of Peak Sensitivity |
570 nm |
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| Range of Spectral Bandwidth |
440 to 800 nm |
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| Collector Emitter Saturation Voltage (20 lx, 1.2 µA) |
0.1 V |
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| RoHS |
Compliant |
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| Absolute Maximum Ratings (Ta = 25 C) |
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| Collector Emitter Voltage |
6 V |
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| Emitter Collector Voltage |
1.5 V |
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| Collector Current |
20 mA |
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| Power Dissipation |
100 mW (Tamb≤55°C) |
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| Junction Temperature |
100 °C |
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| Operating Temperature Range |
[-40°C to +85°C] |
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| Storage Temperature Range |
[-40°C to +100°C] |
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| Soldering Temperature |
260°C (t≤5 s, 2 mm distance to package |
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| Thermal Resistance Junction/Ambient |
230 K/W (J-STD-051,soldered on PCB) |
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Wireless Open/Closed Sensor
The wireless open/closed sensor provides information on the status of doors, windows, cabinets, etc. Know if a building or area is being accessed when it should not be, or if a door or window has been left open.
- Sense immediate access.
- Sense if a door, window, drawer has been left open.
« Technical Specifications
- 900 MHz Operating Frequency (25 Channels)
- 300 - 500 ft. Device Range*
- Lithium Ion 3.0V Battery
- Battery Lasts Over 300,000 Transmissions
(~ 2-5 Years Depending on Settings**)
- Includes Magnet and Mounting Hardware.
- Sense immediate door access.
- Sense if a door, window, drawer has been left open.
- Monitor access to specific areas of buildings.
* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting
frequency and other variables.
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| Movement Sensor Specifications |
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| Supply Voltage |
0.5 to 12VDC |
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| Current Sink |
0.00025 to 5 mA |
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| Operating Temperature |
0°C to 70°C |
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| Sensitivity |
0.05g – 0.10g OR 10g OR 35g OR 60g OR 150g |
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| RoHS |
Compliant |
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| Magnetic Sensor Specifications |
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| Power Supply Voltage |
-0.1 to 4.5 VDC |
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| Output Current |
± 5 mA |
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| Power Dissipation |
536 mW |
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| Operate Point |
South: max 5 mT, North: - 5 mT |
| Release Point |
South: 0.6 mT, North: -0.6 mT |
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| Period |
Max 100 mS |
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| Supply Current |
8.0 µA typ, 12.0 µA max |
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| Operating Temperature |
-40°C to 85°C |
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| Storage Temperature |
-40° to +125°C |
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| RoHS |
Compliant |
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| (Vdd = 1.80 V, Ta = 25 C) |
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| Absolute Maximum Ratings (Ta = 25 C) |
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| Power Supply Voltage |
[-0.1 - 4.5 V] |
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| Output Current |
± 0.5 mA |
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| Operating Temperature |
-40°C to 85°C |
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| Storage Temperature |
-40° to +125°C |
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Wireless Dry Contact Sensor
The wireless dry contact sensor can be used to detect contact between two wired contact points. This sensors can be used with an external mechanical switch or a contact plate.
- Senses immediate contact between wires.
- Senses when contact is broken.
- 36in. lead length.
« Technical Specifications
- 900 MHz Operating Frequency (25 Channels)
- 300 - 500 ft. Device Range*
- Lithium Ion 3.0V Battery
- Battery Lasts Over 300,000 Transmissions
(~ 2-5 Years Depending on Settings**)
- Senses immediate contact between wires.
- Can also sense when contact is broken.
- Variety of lead lengths available.
- User defined thresholds.
- Product comes with standard 36in lead.
* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting
frequency and other variables.
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| Dry Contact Sensor Specifications |
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| Supply Voltage |
2.0 - 3.6 V |
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| Current Consumption |
0.5 µA |
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| Operating Temperature |
[-85°C to +150°C] |
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| Absolute Maximum Ratings: |
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| Supply Voltage: |
[-0.3 to 3.9 V] |
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| Storage Temperature: |
[-50°C to +150°C]* |
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| *Core unprogrammed |
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Wireless Humidity Sensor
The wireless humidity sensor allows you to monitor the relative humidity of the air within a room or enclosure. Ideal for monitoring humidity within greenhouses, industrial spaces, museums, saunas and humidors. They can also be used for residential applications such as controlling mold, mildew or dust mites.
- Activated at set time intervals.
- Measures temperature and relative humidity.
- User defined thresholds.
« Technical Specifications
- 900 MHz Operating Frequency (25 Channels)
- 300 - 500 ft. Device Range*
- Lithium Ion 3.0V Battery
- Battery Lasts Over 300,000 Transmissions
(~ 2-5 Years Depending on Settings**)
- Operating temperature range: -40°C to +125°C.
- +/- 2% accuracy (between 50% - 90% RH).
- Scientific grade sensor.
- Small size is ideal for embedded applications.
- User defined thresholds for alerts and notifications.
* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting
frequency and other variables.
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| Humidity Sensor Specifications |
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| Accuracy: |
+/- 2% under normal conditions (50% - 90% RH) |
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| Energy consumption: |
80uW (at 12bit, 3V, 1 measurement / s) |
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| RH operating range: |
0 – 100% RH |
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| T operating range: |
-40 – +125°C (-40 – +257°F) |
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| RH response time: |
8 sec (tau63%) |
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| Maximal accuracy limits for relative humdity and temperature: |
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Wireless Button Sensor
The touch activated wireless button sensor allows a notification signal to be sent when immediate contact is important. This button includes an LED response indicator to confirm that the system has received the alert.
- Manually triggered push button.
- LED response indicator.
« Technical Specifications
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