The Malema KL-91 Series is a high-purity PFA/PTFE pressure transmitter designed for accurate pressure monitoring of ultra-pure and chemically sensitive fluids in semiconductor and high-purity process applications. The sensor features an all-fluoropolymer wetted construction with PTFE-coated alumina sensing technology, eliminating metallic wetted surfaces, O-rings, and fill fluids to minimize contamination risk and dead volume.

The KL-91 Series is available in inline flow-through and insertion-style configurations with multiple connection options including Flaretek®, Pillar Super 300, 20S, and tube connections. The compact IP65-rated construction provides reliable operation in wet process environments while maintaining excellent chemical resistance and long-term stability. Standard performance includes ±1% full-scale accuracy, pressure ranges up to 80 psig, and analog outputs including 0–10 VDC, 1–5 VDC, 0–5 VDC, and 4–20 mA configurations.

Typical applications include ultrapure DI water systems, CMP slurry monitoring, semiconductor wet benches, filtration condition monitoring, chemical delivery systems, and high-purity process pressure measurement where contamination control and chemical compatibility are critical.