The Fischer Mess DE90A90040P000000001 (Factory Configuration Parameter Set: Parameternr DE90P1X0000001299) is a premier high-precision digital differential pressure transmitter belonging to the renowned PRO-LINE® DE90 Series engineered and manufactured by FISCHER Mess- und Regeltechnik GmbH (Germany) – a global leader in high-performance pressure and flow control instrumentation. This transmitter is specifically developed for measuring ultra-low overpressure, under-pressure, and differential pressure in clean air and neutral, non-aggressive gaseous media.

The instrument features a nominal hardware measuring range of -10 mbar to +10 mbar (-1.0 kPa to +1.0 kPa) pre-configured at the factory under parameter set DE90P1X0000001299 to an asymmetric span of -10 mbar to +6 mbar (-1000 Pa to +600 Pa), tailored specifically for cleanroom airlocks and pressure cascades requiring offset boundary monitoring. At its core is a highly sensitive piezoresistive silicon sensor element delivering exceptional long-term stability and high overpressure resistance. A distinguishing feature of this model is its fully graphic multi-line LC display with intelligent colour-change backlighting, showing a calm green background during normal operation and dynamically switching to a vivid red screen to visually flag alarm and threshold violations. Featuring an industry-standard 4-20 mA analog output, on-site USB-OTG parametrization via FISCHER inTouch software, and a rugged IP65-rated polymer housing, it serves as the ultimate instrumentation choice for GMP cleanroom facilities, hospital isolation rooms, and high-efficiency HVAC systems.

• Manufacturer: FISCHER Mess- und Regeltechnik GmbH
• Brand Origin: Germany
• Full Order Code: DE90A90040P000000001
• Factory Parameterization Code (Parameter Set No.): DE90P1X0000001299
• Product Classification: Digital Differential Pressure Transmitter (PRO-LINE® DE90 Series)
• Sensing Principle: High-precision Piezoresistive Silicon Sensor Bridge
• Pressure Modes: Bidirectional differential pressure, positive gauge pressure, negative gauge pressure
• Service Media: Air and neutral, non-corrosive, non-combustible gases
• Nominal Hardware Measuring Range: -10 mbar to +10 mbar (-1.0 kPa to +1.0 kPa)
• Pre-Configured Measuring Range: -10 mbar to +6 mbar (-1000 Pa to +600 Pa asymmetric span)
• Analog Output Signal: 4 – 20 mA (Standard industrial linear current output)
• Operating Power Supply: DC 24V (Permissible supply range: 18 – 30 V DC)
• Measurement Accuracy: ±0.5% F.S. (Non-linearity, hysteresis, and repeatability combined)
• Long-Term Stability: ≤ ±0.2% F.S. / year
• Overpressure Safety: Proof pressure rating up to 250 mbar – 500 mbar without zero-point shift
• Process Pressure Connections: Pneumatic push-on hose / tube connectors (Ø 6 mm / 6/4 mm hose)
• Integrated Display: Multi-line graphic LC display featuring intelligent dynamic colour-change backlighting (Green: Normal operation / Red: Alarm / threshold exceedance)
• Digital Configuration Interface: Integrated USB-OTG port (Micro-USB) for on-site parametrization via FISCHER inTouch PC software
• Ingress Protection Rating: IP65 (Total dust-tight seal and resistance against water jets)
• Housing Construction: Impact-resistant Polyamide PA6.6 engineering polymer with UV-stabilized Polycarbonate display window
• Wetted Materials: Silicon, Al2O3 aluminum oxide, FKM / NBR elastomer seals
• Operating Ambient Temperature: -10°C to +60°C
• Storage Temperature Range: -20°C to +70°C
• Mounting Configuration: Direct surface/wall mounting or standard 35 mm DIN top-hat rail mounting
• Typical Applications: Cleanroom airlock pressure cascades, GMP pharmaceutical cleanrooms, hospital negative/positive pressure isolation suites, HVAC/AHU HEPA/ULPA filter loading surveillance, medical surgical theaters, and precision semiconductor fabrication facilities