Accurate. Durable. Flexible. Designed for use with Fife’s pneumohydraulic power units and control systems, these sensors are used to guide all varieties of webs, especially opaque and clear films. The SP-1 sensor features a black anodized aluminum body, and is the larger of the three. The SP-3259 and SP-7171 also feature black anodized aluminum bodies, differing only in air supply and signal porting, and are often selected for use in restricted spaces. All are available as corrosion-resistant assemblies.