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Compact Air & Gas Differential Pressure Transmitter | PMD260

Versatile, Compact Micro-Differential Pressure Transmitter for Air & Non-Corrosive Gases

The PMD260 Series is a highly adaptable micro-differential pressure sensor engineered for building automation, HVAC ventilation, filter monitoring, and industrial gas flow detection. Featuring high sensitivity (capable of measuring tiny pressures under 100 Pa), excellent overload capacity (3x full scale), and multiple output options (4–20 mA, 0–10 V, RS485 Modbus), the PMD260 delivers dependable industrial performance in a compact footprint.

Key Applications: HVAC duct pressure, air filter clogging detection, boiler draft/wind pressure, dust collection systems, and OEM gas equipment.
Pressure Ranges: Wide span coverage from 0–200 Pa up to 100 kPa (Bar and PSI ranges available).
Output Flexibility: 4–20 mA (2-wire), 0–10 V (3-wire), or RS485 digital output.
Housing Options: Standard aluminum alloy square shell (PMD263) or stainless steel shell (PMD262) with optional local digital displays.

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Category: Differential Pressure Transmitters (ΔP)

Description

Flexible Industrial Pressure Measurement for Modern Automation

The PMD260 Micro-Differential Pressure Transmitter provides a reliable, cost-effective solution for monitoring clean, dry air and non-corrosive gas pressures in commercial and industrial facilities. Designed with high-sensitivity piezoresistive sensing elements, the PMD260 accurately detects micro-pressure differentials across fans, blowers, air filters, and ventilation ducts. Its robust circuit design includes anti-surge voltage, reverse polarity protection, and high anti-jamming capabilities to ensure continuous, noise-free operation in complex electrical environments.

Custom Housing & Interface Options for OEM Integration

Whether building compact equipment or upgrading facility monitoring, the PMD260 series adapts to your setup:

Standard Aluminum Alloy (PMD263): Features a 47 tower-type 304 stainless steel nozzle for fast, secure tubing connection.
Stainless Steel Enclosure (PMD262): Offers a square stainless steel body with tower nozzle or custom threaded connections.
Wet/Corrosive Media Capability (Above 5 kPa): While ranges under 5 kPa use non-corrosive gas sensors, ranges above 5 kPa can be configured with a 316L isolation diaphragm core on the positive pressure port to measure compatible fluids.

Multi-Protocol Compatibility for Direct BMS & PLC Connection

Simplifying installation, the PMD260 supports standard 2-wire 4–20 mA current loops, 3-wire 0–10 V voltage outputs, or RS485 Modbus digital output. The RS485 variant allows direct multi-drop networking to controllers and PLCs without additional analog-to-digital expansion modules, reducing overall cabling and system costs.

Features

High Sensitivity Micro-Pressure Sensing: Reliably measures micro-pressures under 100 Pa with low zero drift.
Wide Range Capability: Spans from 0–200 Pa up to 100 kPa (0–1 bar / 0–15 psi options).
Robust Overload Resistance: Engineered to withstand pressure surges up to 3 times full scale without damaging the internal sensor.
Multiple Output Signals: Selectable 4–20 mA, 0–10 V (customizable voltage ranges), or RS485 digital output.
Circuit Protection: Built-in anti-surge voltage, reverse polarity protection, and EMC anti-interference design.
Rugged Enclosures & Local Display: Durable IP65 die-cast aluminum or stainless steel housing options with optional LCD/LED display.
Flexible Process Ports: Dual barbed tower fittings for easy push-on connection with standard flexible tubing.

Specification

Parameter	Technical Specification PDF
Measurement Medium	Non-corrosive, dry gases / wind / air (316L diaphragm optional for >5 kPa)
Pressure Ranges	0–200 Pa … 100 kPa / 0–1 Bar / 0–15 PSI
Overload Capacity	3 x Full Scale (300% FS)
Accuracy Class	±0.5% FS (Typical), ±0.2% FS (Custom), ±1.0% FS (Max)
Long-Term Stability	±0.2% FS / year (Typical), ±0.5% FS / year (Max)
Temperature Drift	Zero: ±0.02% FS/°C
Compensation Temp.	0°C to +50°C
Medium Temperature	-30°C to +70°C
Power Supply	12–30 VDC
Output Signals	4–20 mA (Current), 0–10 V (Voltage), or RS485 (Digital)
Protection Rating	IP65
Process Connections	Tower-type barbed nozzle fittings (304 / 316L Stainless Steel)
Electrical Connection	Direct cable outlet

FAQ

1. What media can the PMD260 measure?

For pressure ranges below 5 kPa, the PMD260 is designed strictly for clean, dry, non-corrosive gases and air. For pressure ranges above 5 kPa, an optional 316L isolation diaphragm core is available for the positive pressure side, allowing measurement of media compatible with 316L stainless steel and silicone.

2. Can I connect the PMD260 directly to an RS485 Modbus network?

Yes. When ordering the RS485 output configuration, the transmitter provides direct digital communication via RS485 A/B lines along with standard VCC and GND power connections, eliminating the need for analog input cards on your PLC or Building Management System.

3. Is the PMD260 protected against electrical wiring mistakes?

Yes. The PMD260 features integrated reverse polarity protection and anti-surge protection to prevent internal damage if power cables are accidentally inverted or experience voltage spikes.

4. How do I choose between the PMD260 and the P801 Cleanroom Series?

The PMD260 is a versatile, high-value workhorse for general HVAC ductwork, dust collection, fan pressure control, and standard air monitoring. If your application involves critical pharmaceutical cleanrooms, hospital isolation rooms, or strict zero-drift validation below 50 Pa, we recommend our capacitance-based P801 High-Precision Series.

Downloads

Compact Air & Gas Differential Pressure Transmitter | PMD260 – Datasheet