Industrial Electronics

Vishay sensors offer long-range presence and proximity sensing for light curtain applications

22 April 2020

Longtime Vishay Intertechnology franchise distributor New Yorker Electronics has introduced a new series of Vishay infrared (IR) sensor modules designed for light curtain and perimeter guard applications. Available in five compact packages, they feature a fast 300 μs reaction time. This Vishay Semiconductors TSSP9 series Source: New Yorker ElectronicsSource: New Yorker Electronicsdelivers long range presence and proximity sensing up to 2 m, and a range up to 30 m for light curtain and perimeter guard applications.

Compared to previous generation devices, the Vishay TSSP9 fixed-gain sensors released by New Yorker Electronics provide higher interference strength without spurious signals and an output pulse width closer to the optical burst length. In addition, they offer an almost constant detection threshold over their -25° C to 85° C temperature range and can detect a valid IR signal up to a higher DC illuminance level.

The TSSP9xxx AGC 0 is a good choice for fast proximity applications (~15 ms) by using a burst pattern with variable intensity. The devices are ideal for sensing the distance to objects for drones, robots, toys and vicinity switches. They may also be used as reflective sensors for hand dryers, towel or soap dispensers, water faucets, toilets, vending machine fall detection, and security and pet gates. To simplify designs in these applications, TSSP9xxx series devices feature a PIN photodiode and sensor IC in compact Minimold, Mold, Heimdall, Panhead and Minicast packages.

The modules operate at a supply voltage range from 2.0 V to 3.6 V, feature a low supply current of 0.8 mA and offer carrier frequencies of 38 kHz and 56 kHz. The sensors are designed to receive IR pulses from an emitter with a peak wavelength of 940 nm and are insensitive to supply voltage and ripple noise and provide shielding against EMI, while an IR filter suppresses visible light. The entire series is RoHS-compliant, halogen-free and Vishay Green.

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