The soil contains many substances such as organic acid, inorganic acid,alkali and salt, due to the different content of various substances, sothe soil shows different ph value.Usually the pH in the range of 6.5-7.5soil is called the neutral soil.
RK500-02 pH sensors measure the pH valueshould be a good solution without professional calibration instruments,complex operation, expensive and difficult to carry, can be forcontinuous measurement of soil, waste water pH value, suitable foragriculture, sewage treatment plant, chemical industry, printing anddyeing, paper making, pharmacy, electroplating and environmentalprotection and other fields.

Thingstels RS485/RS232 convertor Features 2 serial inputs and 1 alarminput & relay output, UC1152 supports standard LoRaWAN class Cprotocol, which is perfectly used as a remote data logger or a remoteI/O controller. Coupled with a LoRaWAN gateway, UC1152 enables usersto fastly build up a LoRa-Based IoT solution for data collection, remotecontrol and monitoring of field devices.