Paquin is spotlighting our P85 Thermal Mass Flow Meter purpose built for direct mass flow measurement of dry air and dry gases—low pressure loss, fast response, and industrial I/O in sizes ½″–4″.
Built for: utilities & compressed air, nitrogen/natural gas measurement, water & power plants, semiconductor, chemical, food & beverage, and industrial HVAC
Delivers: ±1.5% accuracy, ±0.25% repeatability, ≤100 ms response, bidirectional measurement, and on device LCD diagnostics
Integrates via: 4...20 mA (with pulse), HART + pulse (0...5 kHz), or RS 485/Modbus, plus two programmable relays. Choose integrated (IP65) or remote (IP68) electronics
The Problem The P85 Solves
Gas utilities and process air systems need stable, calibrated mass flow across changing temperature/pressure conditions while minimizing pressure drop. P85’s thermal principle, fast response, and built in diagnostics provide reliable signals for energy reporting, leak detection, and control, without adding significant ΔP.
What’s New / Why It’s Different
-
Application focused media: dry air & dry gases with wide turndown.
-
Industrial grade connectivity: HART/4...20 mA/pulse or RS 485/Modbus, plus two isolated relays for alarms/batching
-
Rugged by design: 316L / Hastelloy C / Titanium wetted sensor; ANSI Class 150/300 flanges or NPT; IP65/IP68 protection; Ex d II CT6 Gb option
-
Operational features: auto zero, bi directional, low flow cutoff, programmable damping, and selectable engineering units
Applications
- Compressed air & plant utilities: mass balance and energy KPIs
- Nitrogen & inert gases: process control and consumption tracking
- Natural gas: monitoring where thermal mass is suitable (verify gas composition/conditions)
- Water / Power / Semiconductor / Chemical / Food & Bev / HVAC
Key Specifications (snapshot)
| Parameter | Value |
|---|---|
| Applicable medium | Dry air & dry gases |
| Accuracy / Repeatability | ±1.5% / ±0.25% of reading |
| Response Time | ≤100 ms |
| Flow range | 0.2…1744.5 SCFM (0.3...2800 Nm³/h) |
| Pipe size range | 1/2″...4″ (DN15...DN100) |
| Outputs | 4...20 mA + pulse (0...5 kHz), 4...20 mA (HART) + pulse, RS 485/Modbus; 2 isolated relays (250 VAC 10 A / 30 VDC 5 A) |
| Power | 85...265 VAC or 18...36 VDC; <20 W |
| Ingress protection | IP65 (integrated); IP68 (remote) |
| Materials (wetted sensor) | 316L SS / Hastelloy C / Titanium |
| Process connections | ANSI Class 150/300 flanges; NPT (male/female) |
| Media Temperature | 13…248 °F (std) or 13…482 °F (high temp) |
| Ambient Temperature | 13…140 °F |
| Humidity | ≤85% RH |
| Hazardous area | Ex d II CT6 Gb (Optional) |
Connectivity & Integration
-
Order integrated (local display) or remote transmitter; remote kit includes 10 m cable option.
-
Electrical entry: NPT ½″ hub or metric cable gland; ANSI/NPT build codes available to match piping standard.
- Select outputs to match PLC/DCS (analog, Modbus, or HART + pulse) and use relays for alarms/batch logic.
Compliance & Environmental
- Protection: IP65/IP68; Ex d II CT6 Gb available
- Operating envelope: media up to 482 °F (option), ambient to 140 °F; low power (<20 W)
Ordering & Availability
-
Model: P85; with selectable outputs, relays, IP class, sensor/process materials, power, electrical entry, integrated/remote, media temperature option, connection standard/size, and Ex proof option (see "Build Your Part Number").
Download the data sheet (for full technical parameters and dimensions of the P85)
Visit the product page & request a quote - our team will help you select your exact build.