Sensor Detect
How can we build a sensor capable of detecting a type of matter?
How can we build a sensor capable of detecting a substance? For example, as a sensor that can detect or saliva that can detect a compound such as HCl.
it is very difficult to do, General. There is a class of ion-selective electrodes that can be used to measure the concentration of certain ions in solution. Here is a link.
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 GSM Wireless PIR Sensor Camera Motion Detect w Remote  US $185.00
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 4 x Motion Sensor Detect Alarm Dummy Fake CCTV Camera O US $39.58
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 4 x Motion Sensor Detect Alarm Dummy Fake CCTV Camera c US $34.45
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 Dummy Fake CCTV Box Camera Motion Sensor Detect Alarm O US $9.40
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 2 x Motion Sensor Detect Alarm Dummy Fake CCTV Camera O US $21.39
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 Dummy Fake CCTV Box Camera Motion Sensor Detect Alarm c US $8.99
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 2 x Motion Sensor Detect Alarm Dummy Fake CCTV Camera a US $27.80
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 PIR HIDDEN MOTION SENSOR DETECT SPY SONY CCD CAMERA DVR US $113.95
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 PIR HIDDEN MOTION SENSOR DETECT SPY CAMERA SD RECORDER US $142.49
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 Motion Sensor Detect PIR Spy CCTV Camera SD Recorder US $169.99
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 PIR HIDDEN MOTION SENSOR DETECT SPY CAMERA SD RECORD US $199.99
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 Fake Dome CCTV Security Camera w Motion Detect sensor US $.99
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 APC NBES0301 NETBOTZ SPOT FLUID SENSOR FLUID DETECT US $99.49
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 PIR HIDDEN SPY CAMERA SD RECORDER MOTION SENSOR DETECT US $141.55
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Techni-Tool Non-Contact AC Sensor, Detects: 50 To 1000V Sale Price: $19.95  |
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CAT IV Rated! Outstanding safety instrument locates defective ground, energized circuits and induced voltage. No contact with conductor wire required. Senses voltage through insulation. Fits in shirt pocket for convenience... |
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Wireless Motion Detector Sensor List Price: $49.95 Sale Price: Too low to display Average Rating:  |
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Extra Wireless Motion Detector Sensor for Mace Security System Mace model # 80357 This is for an extra wireless motion detector sensor to be used with the Mace Brand Wireless Home Security System ONLY... |
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Directed Electronics 506T I.T. Audio Sensor List Price: $29.95 Sale Price: Too low to display Average Rating: |
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DIRECTED ELEC GLASS |
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Smoke Alarm - Dual Sensor - Detects Flaming and Smoldering Fires - Battery Operated - Kidde PI9000 Sale Price: $39.99 |
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Brand: Kidde - Part No.: PI9000 - UPC: 4787142007 - Battery Type: 9 Volt Alkaline (Included) - Depth: 1.8 in. - Diameter: 5.75 in. - Finish: White - Sensor Type: Ionization Sensor for Fast Flaming Fires - Secondary Sensor: Photoelectric Sensor for Smoldering Fires - Warranty: 5 Years - UL Listed: Yes - Case Quantity: 3 - |
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Water Alarm - Detects Leaks and Saves Your Home! (Grey) (4.25"H x 3.25"W x 1.25"D) List Price: $20.39 Sale Price: $9.88 Average Rating:  |
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Water damage is one of the main ways that the value of a home can be diminished. Accidents will happen! Water heaters break down and water pours out, washing machines overflow, pipes wear thin and leak - and when these things happen, water will start to destroy your home... |
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Ms-2 Gasoline Propane Sensors Gas & Prop Sensor F/All Detect 20' Sale Price: $66.80 |
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Xintex MS-2 Gasoline Propane Sensors - GAS & PROP SENSOR F/ALL DETECT 20' |
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Aurora Sale Price: $1.99 |
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Floor Sensor Pad Size: 24x 36 Mounts on floors, etc. -detects exit/entry or fallen residents List Price: $142.00 Sale Price: $109.00 |
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Floor Sensor Pad Size: 24x 36 Mounts on floors, etc. -detects exit/entry or fallen residents Model P-8-22 Floor Sensor Pad placed on floor near bed or other areas to detect exit or fallen residents. Size: 24”x 36” Product photo may not exactly match the product offered for sale... |
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Shear Tech SC-4000 Automatic Check Strip-Coder, Full size keyboard and large 2-lines display for easy reading, Encode any number of fields in one pass, Journal printer, Sensors to detect document dog-ear, end of the ribbon, transport and encode failure, Adjustable strip, Leading/Trailing edge. Sale Price: $7,764.00 |
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Shear Tech SC-4000 Automatic Check Strip-Coder, Full size keyboard and large 2-lines display for easy reading, Encode any number of fields in one pass, Journal printer, Sensors to detect document dog-ear, end of the ribbon, transport and encode failure, Adjustable strip, Leading/Trailing edge, 115/220 VAC, 50/60 Hz Voltage, Current 6/3 Amp Max. |