Sensor Selection Reference Guide

Explore common IoT sensors by measurement type, datasheet field, cost, power, accuracy, and lifetime.

An interactive sensor reference workbench for reading datasheets, filtering common IoT sensors, comparing requirement fit, and checking technical caveats before selection.

Animation Sensor Reference Datasheets Trade-offs

Sensor Selection Reference Guide

Use this reference as a guided datasheet reader. Pick a measurement need, apply constraints, compare common sensors, and inspect the warnings that matter before choosing parts.

-- Selected sensor

-- Reference fit score

-- Typical active current

-- Approx. 5-year per-unit cost

1. Measurement

Start with what must be sensed and the useful operating range.

2. Accuracy

Compare accuracy under stated conditions, not marketing claims.

3. Power

Separate active current, sleep current, heater current, and duty cycle.

4. Interface

Check bus, voltage, libraries, timing, and calibration workflow.

5. Caveats

Record what must be tested before deployment.

Datasheet Reading Animation

Use Play or Step to move through the reference process. Sensor cards and warnings update as the learner changes constraints.

Measurement Constraints Caveats

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Reference warning --

Filtered Sensor Reference

Cards are sorted by the current requirement fit. Click a card to inspect its datasheet fields and warnings.

Reference Controls

Filter the reference by measurement type, then tighten accuracy, power, cost, and service-life expectations.

Scenario

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General reference Battery weather node Classroom air quality Tank level prototype Motion tracker Scenario presets change the constraint emphasis.

Environment

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Indoor stable Outdoor variable Industrial harsh Environment changes how much caveats matter.

Accuracy need

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Higher values prefer sensors with tighter accuracy or direct measurement.

Power strictness

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Higher values prefer low active current and duty-cycle-friendly devices.

Unit budget

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Budget is a first filter, not the final decision.

Service life need

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Long life penalizes sensors with heaters, drift, or frequent calibration.

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Fit Score

Teaching estimate for comparing reference entries.

fit = measurement + accuracy + power + cost + life + caveat

Power Reading

Active current alone can mislead if duty cycle or warm-up is ignored.

check active current, sleep current, heater current, and sample interval

5-Year Cost

Low purchase price can lose when calibration and replacement dominate.

cost_5yr = part + replacements + calibration + maintenance

Decision Rule

A reference table narrows choices; it does not replace datasheets or field testing.

shortlist only if caveats match deployment conditions

Sensor Reference Quick Guide

Read these fields first

• Measurement type and usable range.
• Accuracy, repeatability, and conditions.
• Active current, sleep current, and warm-up behavior.
• Interface, voltage, library maturity, and calibration method.

Common traps

• eCO2 is not the same as true CO2.
• Gas sensors with heaters are rarely coin-cell friendly.
• Low-cost distance sensors need temperature and target-surface checks.
• Indoor modules can fail outdoors even if the range looks correct.

Good reference habit

• Use tables to shortlist, then open the current datasheet.
• Check the test condition behind every accuracy number.
• Prototype with realistic cable length, enclosure, airflow, and mounting.

Technical Accuracy Notes

Values are representative

Breakout boards, clones, firmware settings, sample intervals, and supply voltage can change practical behavior. Always check the exact part and module datasheet.

Accuracy needs conditions

Accuracy can depend on humidity, temperature, airflow, aging, mounting stress, target material, calibration, and the algorithm used to interpret the reading.

Safety requires rated instruments

Low-cost air-quality or gas modules are useful for learning and trends. Use calibrated, safety-rated, or regulated instruments when the measurement affects safety or compliance.

Practice Checks

Battery weather node

Filter to environment sensors. Increase power strictness and service life. Which reference entries survive and what enclosure issues remain?

Classroom ventilation

Filter to gas sensors. Compare eCO2 and true CO2. Which option is acceptable for trend indication versus compliance reporting?

Tank level

Filter to distance sensors. Decide whether ultrasonic or time-of-flight behavior better matches the liquid, tank shape, sunlight, condensation, and range.

Sensor Selection Decision Guide

Apply the reference fields to a decision path with TCO, power, and constraint scoring.

Sensor Selection Scenarios

Practice matching sensor choices to realistic deployment cases and trade-offs.

Power Budget Calculator

Convert current, duty cycle, battery capacity, and derating into practical lifetime estimates.