Pressure switches hex 27 Changeover with silver or gold contacts • Switching point can be adjusted when fitted on site11 • Factory adjustable hysteresis (except types 0140 and 0141) • High overpressure safety and long service life under harsh conditions • Operating voltage up to 250 V • Series 0140 / 0141 with protective insulation [□] • For ready-wired customized versions refer to chapter M.5, starting at page 62 • For pressure switches with integrated connectors refer to chapter M.2, starting at page 32 1 Pressure switches can also be supplied preset at factory. Our preset switches are sealed with lacquer paint, set points are embossed on the housing.

Technical details Temperature resistance of sealing materials Switching performance and materials overview

Pressure switches hex 27 Electrical values 11 For technical explanations refer to page 9

0140 / 0141 Diaphragm / piston pressure switches 250 V • Protection class 2, protective insulation • Zinc-plated steel (CrVI-free) • Changeover with silver contacts • Overpressure safety up to 300 / 600 bar1 • Includes polyamide cap, protection class IP65 Article number 0140 Diaphragm pressure switches with screw terminals 0.3 - 1.5 Refer to page 53 for the temperature range and application thresholds of sealing materials. 1 Static value. Dynamic value is 30-50 % lower. Values pertain to the hydraulic/pneumatic part of the pressure switch.

0170 / 0171 Diaphragm / piston pressure switches up to 42 V • Zinc-plated steel (CrVI-free) • Changeover with silver contacts • Overpressure safety up to 100 / 400 / 700 bar1 • Hysteresis adjustable at factory Seal material - Application areas NBR Refer to page 53 for the temperature range and application thresholds of sealing materials. 1) Static value. Dynamic value is 30-50 % lower. Values pertain to the hydraulic/pneumatic part of the pressure switch. 2) Excluding the thread sizes G 1/8, R 1/8, NPT 1/8 and M 10x1 cylindrical/conical. 3) HNBR diaphragm not available for pressure ranges between...

Diaphragm / piston pressure switches up to 250 V Zinc-plated steel (CrVI-free) Changeover with silver contacts Hysteresis adjustable at factory Adjustment range in bar Tolerance at room temperature in bar Article number Male thread 0180 Diaphragm pressure switches with spade terminal M 10x1 con. 0181 Piston pressure switches with spade terminal Seal material – Application areas NBR EPDM FKM FFKM HNBR 3) Hydraulic/machine oil, air, nitrogen, etc. Brake fluid, hydrogen, oxygen, acetylene, etc. Hydraulic fluids (HFA, HFB, HFD), petrol/gasoline, etc. Hot water, chemical acids, diluted alkalis, ketones,...

0183 Piston pressure switches up to 250 V • Zinc-plated steel (CrVI-free) • Changeover with silver contacts • Overpressure safety up to 600 bar11, Hysteresis adjustable at factory • Adjustment range: 100 - 400 bar • Height only 51 mm Thread similar to ISO 6149-3 (including O-ring for sealing) C€ Accessory ► Not included in the delivery. Please order separately. Article number 0183 Piston pressure switches with spade terminal 600“ Seal material - Application areas

0186 / 0187 Diaphragm / piston pressure switches up to 250 V with stainless steel housing • Stainless steel housing (1.4305 / AISI 303) • Changeover with silver contacts • Overpressure safety up to 100 / 400 / 600 / 700 bar1’ EPDM-TW and silicone diaphragm up to max. 35 bar2’ • Hysteresis adjustable at factory Article number 0186 Diaphragm pressure switches with spade terminal 10011 Refer to page 53 for the temperature range and application thresholds of sealing materials. “ Static value. Dynamic value is 30-50 % lower. Values pertain to the hydraulic/pneumatic part of the pressure switch. 2)...

0190 / 0191 Diaphragm / piston pressure switches up to 24 V with gold contacts • Zinc-plated steel (CrVI-free), with spade terminal • Changeover with gold contacts • Overpressure safety up to 100 / 400 / 700 bar11 • Hysteresis adjustable at factory 0190 Diaphragm pressure switches with spade terminal 0191 Piston pressure switches with spade terminal Seal material - Application areas 0190 - 461 01 - X - 010 Refer to page 53 for the temperature range and application thresholds of sealing materials. 1) Static value. Dynamic value is 30-50 % lower. Values pertain to the hydraulic/pneumatic part of...

0196 / 0197 Diaphragm / piston pressure switches up to 24 V with stainless steel housing • Stainless steel housing (1.4305 / AISI 303) • Fitted with changeover contact and gold contacts • Overpressure safety up to 100 / 400 / 600 / 700 bar11 EPDM-TW and silicone diaphragm up to max. 35 bar2) • Hysteresis adjustable at factory Article number 0196 Diaphragm pressure switches with spade terminal AMP 6,3 x 0,8 0197 Piston pressure switches with spade terminal 700" 600" 3) Seal material - Application areas Refer to page 53 for the temperature range and application thresholds of sealing materials....