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You have to connect this pin to the GND
Power can be routed to pin 9 (if required) on the RS232 connector – useful for specific applications
5V higher than the voltage to be output
Instant connection to your probe an your Arduino to get pH measurements at ± 0
Overall Size: 84x41x35(LxWxH)
Lithium Battery Charger Protection Module (BMS) 4S 40A 16.8V coin battery You have to connect thisIntroduction : BMS 4S 40A Balanced 16. 8V~18. 1V Continuous Discharge Current (upper limit): 40A(If the cooling environment is not good, please reduce the use of load current. Continuous Charge Current (upper limit): 20A Size. About 46x60x3. 4mm 1. 82. 40. 13 Scope: Nominal voltage of 3. 6V, 3. 7V lithium battery(including 18650, 26650, lithium polymer battery) 1. 4S 40A 16. 8V Battery BMS with Balancer ,and it is have Auto Recovery Function. 2.
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