Chilled mirror dew point hygrometer designed for low dew point applications, such as measuring low dew point gases in dry rooms, verifying the performance of dry air in factories, and monitoring moisture levels in drying processes.
DewStar S-2
Dew Point Range: -75 ℃DP to 15 ℃DP
DewStar S-2 is a chilled mirror dew point hygrometer (also known as a mirror-type or optical dew point hygrometer) designed for low humidity applications. It offers excellent long-term stability, high measurement performance, and reliability for low dew point measurement. It is ideal for use as a calibration reference standard in low dew point ranges and for measuring low dew point gases in manufacturing environments.
Brochure (English)
Features
- Equipped with a uniquely designed AccuStar (automatic mirror cleaning mechanism).
- Optional durable platinum mirror enables measurement of corrosive gases.
- Calculation functions allow on-site confirmation of various measurement values.
- Portable and transportable dew point hygrometer.
Key Applications
- Manufacturing process control for secondary batteries such as lithium-ion batteries
- Measurement of low dew point gases in dry rooms
- Moisture management in drying processes, etc.
Order Code
| Code | Mirror | Sensor Unit Coating |
| S-2S-0 | Rhodium | x |
| S-2S-4 | Platinum | x |
| S-2S-6 | Platinum | o |
*1 Separate monitor (S-1M-0) for the chilled mirror dew point hygrometer is required.
*2 Platinum mirror and sensor unit coating enable measurement of corrosive gases. For details on compatible gases, please contact us.
| Product Name | Chilled mirror optical dew point hygrometer |
| Model | DewStar S-2 |
| Dew Point / Frost Point Range | -65 ~15 ℃DP (Air-cooling） -75 ~ 15 ℃DP (Water-cooling) |
| System Accuracy | ± 0.2 ℃DP（-50 ℃DP <） ± 0.4 ℃DP（≦ -50 ℃DP） |
| Repeatability | ± 0.1 ℃DP（at 25 ℃） |
| Operating Conditions | Sensor Unit: 0 ~ 60 ℃ Monitor Unit: 0 ~ 35 ℃ ≤ 95%rh (non-condensing) |
| Sampling Flow Rate | 0.5 ~ 2.5 L/min |
| Measured Values | Dew Point / Frost Point (℃) Temperature (℃) Pressure (kPa) |
| Calculated Values | Relative Humidity (%rh) Absolute Humidity (g/m³) Moisture Content (PPMv, PPMw) |
| Outputs | Digital: RS-232C Analog: 4 ~ 20 mA, 0 ~ 5 VDC PhotoMOS Relay |
| Sample Gas IN-OUT | 1/4″ Compression Fitting |
| Power Supply | AC 90 ~ 240 V（50 / 60 Hz） |
| Power Consumption | 200 W |
| Dimensions | Sensor Unit : W 166 x H 333 x D 432 [mm] Monitor Unit : W 203 x H 105 x D 33 [mm] |
| Weight | Sensor Unit : Approx. 10.0 kg Monitor Unit : Approx 0.5 kg |
| Included Items | Sensor Unit ⇔ Monitor Unit Connection Cable (Standard 3 m) |
Options
- Temperature Sensor S-1S-001
- Air Pump Unit S-PU
Technical Documents
- Brochure (English)