CRDS Trace Moisture Analyzer with Innovative Spectral Analysis Technology Achieving Unprecedented Miniaturization
CRDS Trace Moisture Analyzer
DewTracer mini CRDS-H₂O
DewTracer mini CRDS-H₂O is a trace moisture analyzer for a wide range of gases, based on CRDS (Cavity Ring-Down Spectroscopy) technology utilizing laser techniques.
With proprietary optical design and spectral analysis technology, it achieves unprecedented miniaturization.
It enables highly sensitive, highly accurate, and high-speed measurement of trace moisture (12 ppbv to 20 ppmv, -100 to -55°C DP) in high-purity gases, including carrier gases and atmospheric gases.
* DewTracer mini CRDS-H2O has been developed with cooperation of the National Institute of Advanced Industrial and Technology (AIST).
Brochure（English）
High-Speed Response
1000 ppbv → 50 ppbv
63% Response 15.4 s
90% Response 52.4 s
（Measured Gas : N₂）
50 ppbv → 1000 ppbv
63% Response 26.5 s
90% Response 37.4s
（Measured Gas : N₂）
High-Accuracy
Comparison Data with Primary Standards provided by the National Institute of Advanced Industrial Science and Technology (AIST) in Japan (1)（Measured Gas : N₂）
Comparison Data with Primary Standards provided by the National Institute of Advanced Industrial Science and Technology (AIST) in Japan (2)（Measured Gas : N₂）
High-Sensitivity
Comparison Data with Primary Standards provided by the National Institute of Advanced Industrial Science and Technology (AIST) in Japan (3)（Measured Gas : N₂）
Reliable Measurement Data
- Uncertainty is calculated through collaborative research with the National Institute of Advanced Industrial Science and Technology (AIST) in Japan.
- All units shipped undergo comparative calibration against internal reference instruments traceable to national standards supplied by AIST.
User-Friendly Design
Selectable Installation Options Based on Applications and Locations
Simple Operation
Various Functions Available via Optional Monitor (Equipped with a 5-inch Full-Color Touch Panel) or a PC with Bundled Software Installed.
- Start and stop measurements
- Configure various settings
- Display settings (Measurement Values, Trend Graphs, Spectral Waveforms)
- Malfunction prevention lock function
- Sensor operation status monitoring
- Alarm function and more…
External Data Output
Measurement values or calculated values can be output externally in various formats.
* An optional monitor is required.
* Digital output (RS-232C) comes standard with the optional monitor.
Analog output and relay output are available as additional options.
Safety Measures
- UJR/VCR fittings are used for gas-contacting parts, ensuring compatibility with chemical-resistant and corrosive gases.
- To prevent hazardous gases, such as flammable or toxic gases, from leaking outside the enclosure in the unlikely event of a pipe leak within the housing, the device is equipped with a purge port for inert gases like nitrogen to maintain internal enclosure safety.
Specifications
| Product Name | CRDS Trace Moisture Analyzer |
| Product Type | DewTracer mini CRDS-H2O |
| Measurement Method | CRDS (Cavity Ring Down Spectroscopy) |
| Measurement Range | 12 ppbv to 20 ppmv (-100 to -55 ℃ DP) |
| Accuracy | ±4% or ±12 ppbv |
| Response Speed | Approx. 60 s (90% response for 50 ⇔ 1000 ppbv change) |
| Operating Conditions | Temp.: 10 to 40 ℃ Humidity: 35 to 80% RH (non-condensing) |
| Sample Gas | Type: Air, N₂, O₂, Ar, etc. * Other gases are supported. Contact us for more information and assistance. Temp.: 5 to 60 ℃ Flow Rate: < 2.0 L/min Pressure: 86 to 106 kPaA (Options for < 900 kPaA available) |
| Purge Gas | Flow Rate: < 5.0 L/min (when using the purge function) |
| Measured Values | Volume mole fraction [ppmv] Gas temp. [℃] Gas pressure [PaA] |
| Piping | 1/4 inch (1/4 inch : UJR-RP) |
| Power Supply | AC adapter (100-240 V, 50/60 Hz, 1.4 A max) |
| Power Consumption | Approx. 10 W |
| Dimensions | W 150 x H 165 x D 300 [mm] |
| Weight | Approx. 5 kg (excluding AC adapter) |
| Product Name | Optional Monitor (for DewTracer mini CRDS-H₂O) |
| Product Type | mini CRDS PC-D0V1 |
| Display | Color LCD (800×480 WVGA), 5-inch touch panel |
| Measured Values | Volume mole fraction [ppmv] Gas temperature in measurement unit [℃] Gas pressure in measurement unit [PaA] |
| Calculated Values | Dew Point / Frost Point Temperature [℃DP] |
| Output | Digital: RS-232C Analog: 4 to 20 mA (Optional) Relay: MOS FET Relay (100 V / 300 mA) (Optional) |
| Power Supply | Powered by DewTracer mini CRDS-H₂O (Dedicated power cable included) |
| Power Consumption | Approx. 30 W |
| Dimensions | W 150 x H 200 x D 75.4 [mm] |
| Weight | Approx. 1.7 kg |
Key Applications
●High-purity gas production, inspection, and filling processes for semiconductors
→ Process efficiency improvement
Cost reduction through decreased consumption of expensive gases
●R&D and manufacturing processes for all-solid-state batteries
●Management and control of glove boxes, dry chambers
○R&D and manufacturing processes for semiconductors
○R&D and manufacturing processes for high-purity medical gases
○R&D and manufacturing processes for pharmaceuticals
○R&D and manufacturing processes for lithium-ion batteries (LiB)
○R&D and manufacturing processes for electric double-layer capacitors (EDLC)
○R&D and manufacturing processes for organic EL devices
○R&D and manufacturing processes for flat panel displays
○Anti-corrosion and condensation prevention for precision electronic components
○Humidity control in powder manufacturing processes
○Inspection, performance verification, and evaluation of high-barrier films
○Manufacturing processes for high-purity silicon and other semiconductor materials, etc.
Technical Documents
- Brochure (English)
- Technical article (Japanese Only) （計測標準と計量管理. 2024, 74(1), p 21-29）