Safety Technology International MS4336 Light Curtain Transmitter 39 Inch

The STI MS4336 Minnisafe Light Curtain Transmitter is a 39‑inch safety beam transmitter in Safety Technology International’s MiniSafe family (model MS4336; stock number 125786). Designed to pair with a compatible STI receiver to create a complete light curtain guard, it transmits infrared beams across an access area and signals the control system when a beam is interrupted, enabling automatic machine shutoff to protect personnel in industrial settings. This transmitter is commonly used to guard operators around presses, robotic cells, conveyors, and other automated equipment that require a guarded zone. Distributor listings show the MS4336 available in refurbished condition, reflecting asset reuse in safety installations. To form a working system, a matching STI MiniSafe receiver is required; the exact pairing depends on installation, but the MiniSafe line is built for straightforward transmitter–receiver configurations within standard safety circuits. The 39-inch form factor provides coverage for wider access points or custom mounting along guard openings, and the unit’s rugged construction suits demanding shop-floor environments. For reliable operation, proper installation, beam alignment, and adherence to applicable safety standards are essential to ensure prompt shutdown when access is detected.