用途：用于测量正负压差；适用于药厂、电子厂洁净厂房的净压差测量,暖通空调过滤网压差的检测等
外型：长方形塑料外壳，小巧结实
范围：0-80mmw.c.,10-0-700Pa等几十种范围规格
最大过压：100KPa
最大工作温度：54°C
精度：±3%F.S.O.
尺寸：188.12X150.02X28.58mm
| 型号 | 范围 | 充液 |
| MARK II 25 | 0-3" w.c. | Red Oil, .826 sp gr |
| MARK II 26 | 0-7" w.c. | Blue Oil, 1.91 sp gr |
| MARK II 27¹ | 0-7000 fpm | Red Oil, .826 sp gr |
| MARK II 28¹ | 0-10,500 fpm | Blue Oil, 1.91 sp gr |
| MARK II MM-80 | 0-80 mm w.c. | Red Oil, .826 sp gr |
| MARK II MM-180 | 0-180 mm w.c. | Blue Oil, 1.91 sp gr |
| MARK II M-700PA | 10-0-700 Pa | Red Oil, .826 sp gr |
| MARK II 40-1 | .1-0-1.0" w.c. | Red Oil, .826 sp gr |
| MARK II 40-25MM | 0-26 mm w.c. | Red Oil, .826 sp gr |
| MARK II 40-250PA | 10-0-250 Pa | Red Oil, .826 sp gr |
| MARK II 41-2 | .2-0-2.4" w.c. | Blue Oil, 1.91 sp gr |
| MARK II 41-60MM | 0-60 mm w.c. | Blue Oil, 1.91 sp gr |
| MARK II 41-600PA | 20-0-600 Pa | Blue Oil, 1.91 sp gr |
| MARK II 40-1-AV¹ | 0-1.1" w.c. & 0-4200 fpm | Red Oil, .826 sp gr |
| MARK II 40-250PA-AV¹ | 0-260 Pa & 0-21 mps | Red Oil, .826 sp gr |
| MARK II 41-2-AV¹ | 0-2.5" w.c. & 0-6300 fpm | Blue Oil, 1.91 sp gr |
