ADEV HSM300 Online Dew Point Meter
| Origin | Italy |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | HSM300 |
| Product Type | Online Dew Point Meter |
| Measurement Principle | Capacitive Polymer Film Sensor |
| Operating Temperature | -10 °C to +50 °C |
| Accuracy | ±2 °C (dp) |
| Repeatability | 0.5 °C (dp) |
Overview
The ADEV HSM300 Online Dew Point Meter is an industrial-grade, continuous moisture monitoring instrument engineered for high-reliability measurement of dew point temperature in compressed air, inert gases, natural gas, and other process streams. It employs a robust capacitive polymer film sensor—proven for long-term stability in low-humidity environments—and integrates proprietary auto-calibration algorithms that actively compensate for sensor drift under dry conditions. Unlike chilled-mirror or aluminum oxide-based systems, the HSM300’s thin-film architecture delivers rapid response (t95% ≤ 1 s), minimal hysteresis, and immunity to transient condensation events. Designed for permanent installation in critical infrastructure—including nitrogen blanketing systems, semiconductor purge lines, pharmaceutical drying tunnels, and LNG dehydration units—the HSM300 operates continuously across a wide pressure range (up to 30 MPa) and supports remote mounting with signal transmission over distances up to 1 km without repeater amplification.
Key Features
- Capacitive polymer film sensing element with built-in anti-condensation and chemical resistance—validated for exposure to hydrocarbons, CO₂, SO₂, and trace halogenated solvents
- Real-time automatic calibration algorithm that corrects baseline drift during prolonged operation at low dew points (< −40 °C dp)
- Temperature-compensated output with integrated Pt100 RTD for ambient compensation; temperature coefficient < 0.05 °C/°C
- True single-point full-range calibration capability—no span gas required; traceable to NPL (UK) and NIST (US) standards for −75 °C to +20 °C dp
- Dual programmable alarms with isolated solid-state relay outputs; configurable hysteresis and delay timers
- IP65 (NEMA 12) standard enclosure; optional IP66 (NEMA 4) molded connector variant for outdoor or washdown environments
- 4–20 mA current loop output with HART® protocol compatibility (optional); also supports 0–5 V analog output
- Backlit LCD display with 4-digit dew point readout, real-time status indicators, and diagnostic codes
Sample Compatibility & Compliance
The HSM300 is compatible with non-corrosive, non-particulate gas streams operating at pressures from vacuum to 30 MPa. Its sintered stainless-steel protective filter (80 µm) enables direct insertion into flow paths with volumetric rates of 0–10 NL/min, while standard sampling block installations support 1–5 NL/min. The sensor exhibits negligible cross-sensitivity to CO, CO₂, O₂, and common VOCs below 100 ppm. The instrument complies with ISO 9001:2015 quality management requirements and supports GLP/GMP documentation workflows through audit-trail-capable configuration software. While not intrinsically safe, it may be deployed in Zone 2/Class I Div 2 hazardous areas when installed with appropriate barrier systems per IEC 60079-11.
Software & Data Management
Configuration and diagnostics are performed via USB-connected PC software supporting Windows OS. The application provides firmware update capability, calibration history logging, alarm event timestamps, and raw sensor capacitance trending. All parameter changes—including alarm thresholds, damping coefficients, and output scaling—are recorded with user ID and timestamp for regulatory traceability. Data export is available in CSV format, enabling integration with SCADA, DCS, or LIMS platforms. The system meets foundational requirements for FDA 21 CFR Part 11 compliance when used with validated electronic signatures and access controls implemented at the host system level.
Applications
- Continuous monitoring of dew point in instrument air and plant air networks to prevent valve freezing and pneumatic failure
- Moisture control in nitrogen generator outlets and inert gas blanketing systems for explosion-proof storage tanks
- In-line verification of desiccant dryer performance in pharmaceutical fluid bed dryers and lyophilizer purge circuits
- Quality assurance in SF₆-insulated switchgear and high-voltage transformer gas compartments
- Process validation for cryogenic air separation units and hydrogen purification skids
- Environmental chamber humidity profiling where sub-ppm water vapor detection is required
FAQ
What is the lowest measurable dew point with the HSM300?
The instrument is specified for continuous operation down to −100 °C dp in dry nitrogen or argon. For measurements below −75 °C dp, traceability is established against primary cold mirror reference standards per ISO 8503-2.
Can the sensor be cleaned in situ?
No routine cleaning is required due to the hydrophobic polymer surface and integrated contamination resistance. If exposed to heavy oil mist or particulates, the sintered filter may be ultrasonically cleaned with isopropanol; sensor replacement is not field-serviceable.
Is the 4–20 mA output linear across the full dew point range?
Yes—the transmitter provides true linear current output across the entire calibrated range (e.g., −100 °C dp = 4 mA, 0 °C dp = 20 mA), with factory-set zero and span verified at time of shipment.
How does the auto-calibration function operate?
During periods of stable, ultra-dry gas exposure (typically < −60 °C dp for ≥2 hours), the firmware executes a zero-point adjustment by referencing known dielectric behavior of the polymer film—no external gas standard or manual intervention is needed.
What certifications does the HSM300 hold?
It carries CE marking per EMC Directive 2014/30/EU and RoHS 2011/65/EU. Electrical safety conforms to EN 61010-1:2010. Calibration certificates include uncertainty budgets compliant with ISO/IEC 17025:2017.
