3. 차압트랜스미터 다호/한국 산업용 차압트랜스미터 EDN.550 Keller / 스위스 산업용 차압트랜스미터 Series PD-23 Series PD-33X Series PRD-33X Series PD-39X 방폭용 차압트랜스미터 Series PD-33X Ei Series PD-39X Ei Labom / 독일 PASCAL Ci4 series - mutifunctional CI4340 CI4300 CI4330 CI4350 PASCAL CV4 series - compact CV4300 PASCAL CV3 series - modular CV3300 CV3330 Universal / compact - analogue CP1310 Mid-West Instrument / 미국 Movement of Piston / magnet by calibrated spring Model 121 Model 124 Model 220 Model 140 Model 142 Model 240 Piezoresistive differential pressure sensor sensing element with stainless steel Model 700/710/715