Profile: HNL Engineering specializes in precision machining services. We manufacture pressure and differential pressure switches. The precision machining division provides turning, milling, drilling and tapping in a wide range of sizes and materials. Our minifolds are available in both aluminum and stainless steel in different sizes and number of outlets. The minifold are ideally suited for the distribution of both liquids and gases at pressures from vacuum to 60 bar. We also manufacture a wide range of pressure and differential pressure switches with both electrical outputs and pneumatic outputs. These include ATEX certified pressure switches suitable for use in hazardous areas. Our 300 series switch range is available for the measurement of pressure (P & PZ) and differential pressure (DP & DPZ). There are pressure ranges for the measurement of gauge pressure above atmospheric pressure (P) and below atmospheric pressure (PZ). Our series 700 is a mechanical temperature switch. The series 800 temperature switch is an electronic device that also functions as a temperature indicator and transmitter. Both the switches are available with aluminum or stainless steel housings and either direct or capillary mounting.