LAN DS18B20 WEB Temperature Monitor 1 meter Cable
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KMtronic RS485 8 Channel ModBus RTU Relay Controller

  The general purpose of RS-485 Eight Channel Relay Controller. Control devices using your PC.   Features: Board number manually through a DIP Switch placed near RS485 connector.   Dimensions:KMTronic_8Relay_Dimension.pdf Required power:12VDC / minimum 600 mA. Model:R4S8CRMB Specifications:Relays have Normally Open (NO) and Normally Closed (NC) Contacts each capable of switching max:– 12VDC/15A– 24VDC/15A– 125VAC/15A– 250VAC/10A . . .

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How to monitor temperatures in your home: KMtronic temperature board

How to monitor temperatures in your home New KMtronic temperature board mounted in Varna   Varna is the third largest city in Bulgaria and the largest city and seaside resort on the Bulgarian Black Sea Coast.   https://www.google.bg/maps/place/Varna/@43.2047556,27.8028249,11z/data=!3m1!4b1!4m5!3m4!1s0x40a4538baaf3d7a1:0x5727941c71a58b7c!8m2!3d43.2140504!4d27.9147333           . . .

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KMTronic USB 4 Channel Relay Board RS232 Serial controlled PCB

KMTronic USB 4 Channel Relay Board, RS232 Serial controlled, PCB   Manufacturer: KMtronic LTD Features: – Fully assembled and tested.– Each relay has an LED to indicate when it is operated.– Relay outputs can be used to turn ON/OFF lights, motors and other devices. Specifications: Relays have Normally Open (NO) andNormally Closed (NC) Contacts each . . .

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KMtronic LAN WEB 8 Channel Relay board