Mechanical Pressure Switches for overpressure, vacuum pressure and differential pressure Switching range: -1 ... + 0.1 bar - 250 ... +100 mbar, 1 ... 16 mbar a 16 ... 63 bar Temperature: max. 70 °C Material: copper, brass, stainless steel, NBR KOBOLD companies worldwide: AUSTRALIA, AUSTRIA, BELGIUM, BULGARIA, CANADA, CHINA, CZECHIA, EGYPT, FRANCE, GERMANY, GREAT BRITAIN, HUNGARY, INDIA, INDONESIA, ITALY, MALAYSIA, MEXICO, NETHERLANDS, PERU, POLAND, Republic of Korea, ROMANIA, RUSSIA, SPAIN, SWITZERLAND, THAILAND, TUNISIA, turkey, USA, VIETNAM KOBOLD Messring GmbH Nordring 22-24 D-65719 Hofheim/Ts. Head Office: +49(0)6192 299-0 +49(0)6192 23398

Mechanical Pressure Switches for overpressure, vacuum pressure and differential pressure Model SCH General Description Mode of operation The pressure applied in the sensor housing (1) acts on the measuring bellows (2). Pressure changes lead to movements of the measuring bellows (2) which are transferred through a pressure pin (4) to the switching rocker (5). The switching rocker is supported on hardened pivot points (6). As the pressure increases the switching rocker (5) moves upwards and operates the micro-switch (7). The spring (8), the initial stress of which can be changed by the setting...

Mechanical Pressure Switches The most important technical data Model SCH Technical Details Valid for all pressure switches with microswitches of the DCM, VCM, DNM, DNS, DDC series. The technical data of the component tested units deviate partly slightly. (Please refer to model sheet) Normal version -version Plug connection Terminal connection Switch housing Pressure connection Aluminium die-cast GD Al Si 12 Aluminium die-cast GD Al Si 12 G ½ external thread (pressure gauge connection) and G ¼ internal thread. Internal thread G ¼ at differential pressure switches DDCM. (only for version with microswitch)....

Pressure Switches Switch units / optional function / connection diagrams Model SCH Connection diagram Normal version microswitch, single pole switching over, switching differential not adjustable Maximum limiter with manual reset device. Interlocking with increasing pressure Minimum limiter with manual reset device. Interlocking with falling pressure Gilded contacts hysteresis not adjustable Switching capacity max. 24 VDC, 100 mA min. 5 VDC, 2 mA DCM025…DCM63, DNM, VCM301…VCM095, VNM, (DDCM), VNS, DNS Terminal connection instead of plug connection protection IP 65 Two microswitches switching...

Switch diagram Option 217 Pressure switches with special equipment can also be used in the Ex area Zone 1. The following alternatives are possible: Pressure switch with pressure-proof encapsulated switching device, degree of protection <g> II 2G Ex d e IIC T6 Gb and <g> II 1/2D Ex ta/tb MIC T80°C Da/ Db -20°C <Ta <+60°C. The pressure switch in pressure-proof encapsulation can be used directly in the Ex area (> Zone 1). Maximum switching voltage, switching capacity and ambient temperature must be taken into account and the rules for the installation in the Ex area must be observed. All pressure...

Component Tests Model SCH ATEX approvals II 2G Ex d e IIC T6 Gb II 1/2D Ex ta/tb IIIC T80 °C Da/Db -20 °C ≤ Ta ≤ +60 °C Model SCH-Ex... Switch housing with switching mechanisms The switch housings consist of high quality and seawater-resistant aluminium diecastings. Three versions are available: IP 54 Housing (normal version) Plug connections to EN 175301; Degree of protection IP 54; Setpoint setting accessible from the outside. Terminal connection (option: 301) With terminal connection box; Degree of protection IP 65; Setpoint setting and terminal connections accessible only after removal of...

Pressure Limiters with Switching Status Lock (restart lockout) Model SCH — 1 In limiter functions it is frequently necessary to retain and lock the shutdown status and to release the lock and switch on the system again only after the causes that led to the safety shutdown have been eliminated. There are two possibilities for this: 1. Mechanical lock inside the pressure switch A "bistable" microswitch is built into the limiters instead of the microswitch with automatic reset. When the value set on the scale is reached, the microswitch switches over and remains in this position. The lock must be...

Pressure Switches and Pressure Monitors for overpressure for non aggressive liquid and gaseous media Model SCH-DCM Technical Details Pressure connection: Switching device: Protection: Pressure sensing element: Fitting position: Max. ambient temperature at the switch unit: external thread G % A (pressure gauge connection) acc. to DIN 16 288 and internal thread G 14 to ISO 228 part 1 rugged housing of seawater resistant aluminium die-casting GD Al Si 12 IP 54, with vertical fitting position DCM 3 ... DCM 63 metal bellows: 1.4571 sensor casing: 1.4104 DCM 025-DCM 1 diaphragm: Cu sensor casing: Cu...

Mechanical Pressure Switches • Summary of Models SCH-DCM, SCH-DCMV Model Order specification Pressure switch with plug connection, housing of aluminium die-casting adjustment range from ... to ... bar / mbar Switching differential adjustable / none adjustable Model. No responsibility taken for errors; subject to change without prior notice.

Pressure Switches with Sensor System in Stainless Steel Version Model SCH-DNM Technical Details Pressure connection: Switching device: Protection: Pressure sensing element: Fitting position: Max. ambient temperature at the switch unit: Max. temperature of the medium: external thread G % A (pressure All parts of the SCH-DNM series of pressure switches which gauge connection) acc. to DIN 16 288 come into contact with the medium are made of stainless and internal thread G 14 to ISO 228 steel. The pressure sensor is welded by the most up-to-date part 1 method without added material. rugged housing...