Does the Senturion contain all we need to start monitoring temperature and humidity without buying any other equipment?

The Senturion is a complete unit and will allow you to monitor temperature, humidity and light, set up thresholds and send out email alerts without any additional software or probes. It will however take up to 8 additional probes and can also send SMS alerts using Intellipool (plus a GSM modem) or an email to SMS gateway service.