SEN/H/T4 – Sentry 4 Channel Transmitter Code Hopping

Sentry SEN/H/T4 4 Channel Code Hopping Transmitter: The Sentry SEN/H/T4 is a high-security 4-channel code hopping transmitter engineered for reliable remote control in residential, commercial, and industrial access applications. Operating on a secure 433.92 MHz frequency, this transmitter delivers exceptional range—up to 100 metres in clear line of sight—while employing advanced KEELOQ® encryption to protect against code grabbing and cloning.

Each transmitter generates unique encrypted transmissions with every press, thanks to over 260 million factory-coded combinations (66-bit encryption), ensuring unmatched security. Every unit has a unique serial number that is never duplicated, providing absolute control and traceability.

Designed for ease of use, the SEN/H/T4 features four buttons and a compact, robust key fob housing crafted from high-quality ABS and PVC. The transmitter is powered by a standard 12V L1028 battery and offers excellent stability via SAW resonator technology.

Compatible receivers include 1-channel and 3-channel options (supporting up to 32 and 8 transmitters respectively). For larger installations of up to 1,000 users, refer to the SENTRY SEN/H1000/R1 receiver system.

Key Features:

• 4-button code hopping transmitter with KEELOQ® encryption
• 433.92 MHz secure frequency with 100m range (line of sight)
• Unique serial number for each transmitter
• Over 260 million unique code combinations
• Compact key fob design with durable casing
• Compatible with SENTRY receivers (not with French Rolling systems)

Sentry Code Hopping Brochure