Jio-Temperature-Humidity-Smart-Home-Safety-Sensor-Device-Automation
2,600 - 2,700 Per piece
This sensors reports various air quality metrics such as temperature, humidity and pressure. I have a ton of those placed in various spots around my apartment. Notable locations are inside the air ventilation system, fridge, bedroom and outside the window. They're so small that they can fit anywhere. I use these for air quality monitoring as well as to provide information to Google Home so I can ask it These sensors communicate over the Zigbee protocol. Zigbee uses a 2.4GHz band that's similar to Wifi. It's main advantage is however that it forms a mesh network. So a tiny sensor running on a button cell doesn't have to connect at a central hub but rather uses the nearest mains powered device to repeat its signal. Since most of the devices are also controlled over Zigbee I in any project have a fairly extensive Zigbee mesh and these sensors never need to broadcast very far. In general the button cell of most of the sensors seems to last between 1-2years before needing to be replaced.
Temperature Measuring Device
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20 Piece (MOQ)
GMH 3511 Product-ID 604953pH / ORP / temp. measuring device w/o accessoriesGMH 3531 Product-ID 602076pH / ORP / temp. measuring device w/o accessoriesGMH 3551 Product-ID 602817pH / ORP / temperature measuring device with datalogger w/o accessories Automatic temperature compensation In operation mode „pH“ an automatic tempera turecompensation (ATC) is possible in the range 0 ... 105 °C if a temperature probe is connected. Otherwise a manual input of temperature is possible. pH calibration Buffer selection, temperature compensation and sensorrating a ccording to calibration result (from 10 ... 100 %) is done automatically. GMH 3511 2-point calibration with Greisinger buffer capsules (GPH 4, 7, 10) GMH 3531, GMH 3551 Either 1-, 2- of 3- point calibration with Greisinger standard buffer, buffer according to DIN19266 (A, C, D, F, G) or manual buffer selection. Calibration interval (not for GMH 3511) The device asks for a recalibration after a selectable time period (1 - 365 days or inactive) GMH 3551 Calibration history additional ORP measurement (Redox) There are 2 choices „mV“ standard ORP or mV measurement „mVH“ temp. compensated conversion to hydrogen system acc. to DIN38404 part 6, table 1 based on the standard ORP electrode (e.g. GE105 with Ag/AgCl system and 3 mol KCl) used. rH measurement (except GHM 3511) Calculation of the rH value by means of a ORP measurement and by manually entering the pH-value. The pH-value may also be taken from a previous pH measurement. Analog output 0 ... 1 V, not changeable 0 ... 1 V = 0 ... 14 pH or -2000 ... 2000 mV, connection via 3-pole jack socket Ø 3.5 mm, resolution 13 bit, accuracy 0.05 % at nominal temperature GMH 3551 Analog output freely scalable data logger (GMH 3551 only) cyclic 10,000 data sets, manual 1,000 data sets (with measuring point input, 40 adjustable measuring point texts or measuring point numbers).
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