Low Differential Pressure Transmitters

Low differential pressure transmitters for measuring very small pressure differences between two measurement points either side of a ventilation fan, both sides of an air filter or either side of clean room wall.

These low differential pressure transmitters have a 4 to 20 milliamp output scaled over a few millibar or a few inches of water, and are typically used in applications matching these requirements:

• Input: Low differential pressures of a few millibar.
• Output: 4-20mA current loop with options for a display and alarm contact switches
• Applications: Ventilation flow, filter condition, negative/positive pressure between rooms.
• Industry: HVAC, Clean Rooms, Hospitals, Laboratories, Pharmaceutical, Medical
• Media Compatibility: Mostly air and non-corrosive gases

Choose a low differential pressure transmitter from the list below to view product specification details and request a price quotation.

• 100 Pa bi-directional range differential air pressure transmitter - Bi-directional low range 4 to 20 milliamp differential pressure transmitter covering an air pressure range from -100 to +100 pascals, for cleanrooms, isolation rooms, and filter monitoring.
• Bidirectional -50 to +50 Pa diff pressure transmitter with user calibration adjustment - Enhance your hvac or filter monitoring system with this accurate and durable low differential pressure transmitter featuring user-adjustable zero and span.

• 4 inch water column range 4-20mA differential pressure sensor for liquids - Low range wet/wet dp sensor for measuring differential pressure of a liquid from 0 to 4 inches of water column.
• DP transmitter for 10bar water line strainer cleaning indication - We have an application for a DP transmitter to indicate when a strainer needs to be cleaned.
• Biogas ATEX 4-20mA pressure transmitter for 0 to 20 mbar range - ATEX approved 4-20mA output pressure transmitter for measuring biogas over 0 to 20 mbar gauge. The XMD has a stainless steel 316L diaphragm and process connection, with a FKM seal for compatibility with biogas.
• ATEX rated room ±100 Pa differential pressure transmitter - Differential pressure transmitter with a -100 to +100 Pascal range for measuring the difference in pressure between the inside and the outside of a room, in an ATEX zone.
• Bi-directional -20 to +100 Pa clean room air diff pressure transmitter - Air diff pressure transmitter for HVAC application to measure in the range of -20 to +100 Pa with an active analog output of 4 - 20 mA

• DPS300 User Switchable Pressure Range, Volts or Current Output Low DP Sensor
• DMD341 Compact Differential Air Pressure Sensor
• PrimAtü 10 Low Cost Low Range Differential Air Pressure Transducer
• DPS200 HVAC Differential Pressure Transmitter

• -200 to 200 Pa bi-directional range 4-20mA output dp pressure transmitter for venturi tube
• -3 to 3 psi dp range high accuracy 4-20mA air pressure transmitter for water treatment use
• -3 to 4 mbar dp range 4-20mA ATEX approved biogas pressure sensor for process control use on a 1bar line
• Wet wet DP sensor for 10 inches of water range
• 0.06 inWG positive air pressure transmitter for HVAC blower fan control
• Low range ATEX approved 100 Pascal range DP transmitter

• 41X High Precision Low Range Pressure Transmitter
• DPS Low Differential Pressure Transmitter

• Biogas HDPE cover PD blower pressure sensor
• Minus 0.25 inWG differential pressure transmitter for negative air pressure difference
• 1 inH2O differential intrinsically safe 4-20mA out air pressure sensor for HVAC use
• 3inH2O differential 4-20mA nitrogen pressure sensor and display for annealing furnace flow control use
• Solvent compatible +/-100mWG dp transmitter with PTFE seals
• Minus 100 pascal suction pressure transmitter