The Fischer Mess DS3101YMYYAYD0014 is a compact, high-reliability electro-mechanical differential pressure switch belonging to the DS31 Series engineered and manufactured by FISCHER Mess- und Regeltechnik GmbH (Germany) – a globally established benchmark in industrial flow and pressure instrumentation. The DS31 series is specifically developed for dependable differential pressure monitoring in liquid media (cooling water, technical water, water-glycol mixtures, lubricants) and neutral gases within space-restricted machinery skids and plant piping networks.

The instrument incorporates a robust measuring chamber machined from brass alloy combined with an elastic NBR elastomer measuring diaphragm, delivering outstanding mechanical fatigue resistance and sealing integrity over extensive switching cycles. Deflection of the measuring diaphragm under differential pressure is transferred directly to actuate 1 integrated microswitch (1 x SPDT potential-free contact). The unit features a nominal measuring range of 0..0.6 bar (0..60 kPa) with an adjustable setpoint switching range of 0.06 to 0.6 bar (60 to 600 mbar) via an internal adjustment screw. A distinctive highlight of model DS3101YMYYAYD0014 is its pre-wired, heat- and oil-resistant 1.5 m silicone cable, which simplifies electrical termination, dampens mechanical vibration, and guarantees ingress protection up to IP65. The Fischer Mess DS3101YMYYAYD0014 serves as an optimal solution for monitoring chiller water/oil filters, proving pump flow circulation, and protecting industrial heat exchanger installations.

• Manufacturer: FISCHER Mess- und Regeltechnik GmbH
• Brand Origin: Germany
• Full Order Code: DS3101YMYYAYD0014
• Product Classification: Compact Industrial Differential Pressure Switch (DS31 Series)
• Dedicated Function: Differential pressure monitoring, filter clogging surveillance, and circulation pump protection
• Pressure Mode: Unidirectional differential pressure (0..Δp)
• Service Media: Neutral liquids and gases, cooling water, technical water, glycol mixtures, lubricating oils, and compressed air compatible with Brass and NBR
• Nominal Measuring Range: 0 to 0.6 bar (0 to 60 kPa / 0 to 600 mbar)
• Switching Adjustment Range: 0.06 to 0.6 bar (60 to 600 mbar)
• Switching Element: 1 microswitch (1 x SPDT potential-free changeover contact)
• Switching Operation: Adjustable setpoint via internal adjustment screw
• Contact Electrical Rating: 250V AC, 3A / 24V DC, 2A
• Switching Reproducibility / Accuracy: ≤ ±1.5% to ±2.0% of full scale (F.S.)
• Nominal Static Operating Pressure: Up to 16 bar (PN16) / 25 bar rating
• Overpressure Safety Limit: Unilateral overpressure protected up to nominal static pressure on either positive (+) or negative (-) port
• Process Pressure Connections: Female thread G 1/4 (standard industrial center distance)
• Diaphragm Material: High-elasticity NBR elastomer
• Measuring Chamber Material: Solid brass alloy
• Electrical Connection: Factory-fitted 1.5 m silicone cable with sealed strain relief gland
• Enclosure Protection Rating: IP65 conforming to EN 60529 (Total dust ingress prevention and resistance against water jets)
• Permissible Medium Temperature: -10°C to +70°C
• Operating Ambient Temperature: -10°C to +60°C
• Mounting Configuration: Direct pipe-mounting or surface/wall-mounting bracket
• Industrial Applications: Industrial chiller water/oil filter differential monitoring, cooling water pump dry-run protection, HVAC circulation flow confirmation, plate heat exchanger surveillance, and industrial air compressor loops