Pressure module has a range of ±4 iwc for low differential applications. The module is available as an external module to MC5, MC5-IS, MC5P and MC2 calibrators, and as an internal module to MC5, MC5P and MC5-IS calibrators. External pressure modules for the MC5-IS intrinsically safe multifunction calibrator include a barometric reference module and several gauge pressure modules ranging from 4 iwc up to 300 psi, including vacuum. Ranges from vacuum up to 15,000 psi can be covered with external pressure modules.