The Continuous Radon Monitor-Flow Through, CRM-FT, uses a highly sensitive Lucas Cell based radon detector that has a low background. The CRM-FT is equipped with a powerful air sampler. The inlet air filter cassette can be coupled with a sampling tube in order to sample air from a remote location that can be more than 100 m away from the monitor. This feature makes the CRM-FT ideal for radon monitoring in locations with a difficult access and in locations where a suitable power supplier is not available. The CRM-FT has the E-Monitoring capability.