The Classic range costs of:
Type 301: Setpoints from 300 Pa to 1 500 kPa. Fixed or adjustable deadband, one or two setpoints, stainless or monel wetted parts, electric or pneumatic switching, large setting scale, 1% repeatability, lowest deadbands, custom options.

The range is divided into:
Model 301: Fixed deadband, single set-point
Model 303: Wide adjustable deadband, single setpoint with individually adjustable set and reset points.
Model 381: Fixed deadband, dual independent setpoints.
Model 304: 25 MPa version of 301
Model 384: 25 MPa version of 381

Type 306: Diaphragm operated switches with low set-point capability. Fixed deadband, one or two set-points, nitrile diaphragm, electric switching, large setting scale, 1% repeatability, custom options. Setpoints from 60 Pa to 1 500 kPa.

The range is divided into:
Model 306: Fixed deadband, single set-point
Model 386: Fixed deadband, dual independent setpoints.

Type 310: Diaphragm operated switches with low set-point and limited static pressure capability. Fixed deadband, single set-point, nitrile diaphragm, electric switching, large setting scale, 1% repeatability. Setpoints from 250 Pa to 160 kPa.

The range is divided into:
Model 310: Setpoints under 7,5 kPa, out-of-balance under 10 kPa, static up to 50 kPa
Model 316: Setpoints to 160 kPa, out-of-balance under 700 kPa, static up to 1 500 kPa.