Field-tested: which cheap sensors actually survive 1+ year deployed

Sensor questions that do not fit other categories. Calibration, sourcing, integration.
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jhon_iot
Posts: 6
Joined: Tue May 05, 2026 11:39 am

Sharing notes from running ~30 sensor nodes for clients over the past 2-3 years. Mix of indoor and outdoor (sheltered) installations.

Survived strongly:
  • DS18B20 (waterproof variant), soil temp probes, fish tanks. Mga 95%+ uptime.
  • BME280, when properly enclosed (small breathable membrane over the sensor opening). Indoor offices, no problem.
  • MPU6050, vibration monitoring on motors. Surprisingly tough.
Failed earlier than expected:
  • DHT22, humidity sensor saturation in slightly humid environments. Reads stuck at 99% RH after months. Replace yearly if in PH conditions.
  • HC-SR04, outdoor units with even mild moisture exposure die within 6 months. Foam degrades, transducer corrodes.
  • Cheap PIR sensors, stuck-open or stuck-closed failures common after a year.
Lessons learned:
  • Conformal coating where you can, adds months to sensor life
  • Mount sensors in 'replaceable' fashion, accept failure as inevitable, design for swap
  • The cheapest sensor is the one you replace every 6 months
Ano yung war stories niyo? Curious especially sa BME280 outdoor, naka-deploy ba kayo nito for over a year sa actual outdoor (rain-exposed)?
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danny_3dprint
Posts: 8
Joined: Tue May 05, 2026 11:00 am

Adding from 3D printing side: enclosure design matters for sensor longevity. Most of my outdoor BME280 builds use a Stevenson-screen-style multi-layer shade. Direct sunlight on a BME280 reads 5-8 degrees high, easy.

STL design tip: print the shade plates separately, glue together with PETG-friendly cement after. One-piece prints have support material residue that traps water.

Re yung MPU6050 vibration monitoring point, fascinating use. May naka-deploy ka with what motor type? Curious sa pickup ng induction vs BLDC vibration signatures.
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