Sensor Systems

Chemical Detection System/ Sensor Evaluation Kit (SC-214 μLogger)

The SC-214 μLogger is a state-of-the-art, compact, remote chemical vapor detection system. The device responds to a broad range of chemical gases in ambient air. It features an advanced microprocessor, onboard temperature and humidity detection, and an array of patented chemicapacitive and chemiresistive sensors. The unit can operate autonomously on battery power for up to 5 hours or can stream data indefinitely over USB 2.0 connection.

The SC-214 and nine-sensor array consists of one chemicapacitive sensor and one to eight chemiresistive sensors. Each sensor can be coated with a custom polymer designed to give unique responses to various classes of chemicals. This allows the user to tune the system for custom chemical detection applications. Temperature and humidity detection allow for the development of compensation and calibration algorithms.


System Specifications

Type SC-214
Sensors One chemicapacitive and up to 8 chemiresistive sensor readouts
Temperature and humidity
Operating temperature -40ºC to +125ºC
Battery temp range may be more restrictive
Operating humidity Non-condensing
Weight 0.7oz, optional 0.4oz case
Power 1.5VDC via AAAA Battery or 5VDC via USB
Communication USB 2.0 Mini-B
Dimensions 53mm x 45mm x 17mm
Warranty Limited 30-day warranty from date of delivery

Detection Capabilities

Depending on the selected polymer coating, each sensor can have a unique response to a broad range of chemical vapors. Sensors may have strong changes in resistivity or capacitance to some classes of chemicals and little or no response to other chemical classes. Resistivity or capacitance may also increase or decrease relative to the baseline, depending on the analyte, temperature, and humidity conditions. Users can coat blank sensors themselves with their own conductive chemically absorbent polymers or can consult with us to select coatings from our array of custom polymers.

Chemical classes detectable by Seacoast Science proprietary polymers
Compound Type Typical Compounds Range of Boiling Points
Alcohols C1–C6 50–175°C
Aldehydes C1–C8 50–175°C
Amides C3–C4 150–250°C
Carboxylic acids C1–C4 100–150°C
Esters C2–C10 30–200°C
Ethers C2–C8 30–110°C
Heterocycles C5–C8 100–150°C
Halogenated hydrocarbons C1–C8 30–120°C
Ketones C3–C8 50–175°C
Nitriles C2–C5 50–120°C
Nitroalkane/aromatic C1–C6 100–210°C
Phosphonates C3–C9 180–210°C
Sulfides C4–C8 90–150°C
Alkanes/Alkenes/Alkynes C4–C12 30–220°C
Aromatics C6–C11 80–220°C