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humidity sensor digital

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humidity sensor digital Customers Reviews

  • Inexpensive drop-in replacement for DHT21

    posted by gigamegawatts

    This is a drop-in replacement for the common DHT22 (aka RHT02) temperature/humidity sensor, but at half the price. I tried replacing a DHT21 in a sensor with this one, and the temperature and humidity readings are in-line with the DHT21. No downtime so far - quality seems to be good.
    You'll probably want to put a 10K pull-up resistor between V and signal - the circuit I'm using it in has one, and that works well.
    This is the lowest price I've found for a DHT21 sensor, by far. You can find analog temperature sensors for less, but they are considerably less accurate. I doubt there is a cheaper humidity sensor out there.
  • Very useful sensor

    posted by mcsarg

    Temperature and humidity sensor very useful for measuring aaplicaciones in electronic equipment, ultra-low power which can be installed on portable equipment, good coverage that protects from bumps
    I would put a protection of cables and most suitable electric insulation on the data bus, and some form of external calibration
    The bottom line is excellent for measuring these parameters and make a datalogger equipment to sample and store temperature and humidity with a microcontroller.
  • DHT22

    posted by bcatalin

    Very fast response in time. Temp and humidity are accurate.It has the pull up resistor on board and mounting hole. It has also cables to connect it. Perfect sensor for temperature and humidity.
    Mounting hole and pull up resistor is helping you from soldering.
    There are a lot of informations on how to use it with Arduino, Raspberry Pi and other development platforms on the web. the DTH22 class for Arduino is straight forward to use.
  • Works as expected

    posted by Mykyry

    This is a repeat purchase (for someone else).Works very well. Temperature and humidity reading are reasonably accurate.I had my previous one for over a year now, and only had to change the battery once, which was very recently. It is still working well.The display is large, and has good contract for brightly lit areas.
    An updated description in DX, specifying time/date feature would be useful.
    Worthwhile purchase, just with it had the old firmware (no date/time).
  • Good product, a little expensive

    posted by work3

    It works as advertised, the screen is good, easy to read data. Power supply is the must for backlight. It catch radio synch signal, from Germany (I believe) while I'm in Saint-Petersburg Russia.
    It you use radio synchronization you should set time zone and switch to zone mode via the zone button on the back side.I dropped one sensor into water. 99% humidity for few hours then back to normal. So it is water proof indeed.
    Good product, buy it.


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