The RA series offers a comprehensive range of radiator thermostats for central and district heating systems. These self-actuating proportional controllers have a small P-band. The RA sensor range includes models like RA 2910 with a built-in sensor, frost protection, and a temperature range of 5-26°C. It also has features for limiting and locking the temperature set-point. The RA 2914 is a low temperature range variant. The RA 2912 is a remote sensor model with similar features, while the RA 2916 is its low temperature range version. The tamperproof options include RA 2920 with a built-in sensor and RA 2922 with a remote sensor. Both have frost protection, a temperature range of 5-26°C, and features for limiting and locking the temperature set-point. The RA 2922 also has an ultra-thin capillary tube that can be adjusted to the required length. With the RA series, you can find the right radiator thermostat for efficient and customizable temperature control in your heating system.