Dew Point Transmitters
DB440 Corrosion-Proof Dew Point Transmitter for Compressed Air Systems (up to 200°C)
Corrosion-proof dew point transmitter rated to 200°C for compressed air systems and other harsh industrial environments.
DB
DABECO Co. Ltd.
DB442 Condensation-Resistant Dew Point Humidity Transmitter (up to 200°C)
Condensation-resistant dew point and humidity transmitter rated to 200°C for high-moisture industrial and climate chamber environments.
Key Features
- Condensation-resistant sensor design for high-moisture environments
- Temperature rating up to 200°C (-40 to 200°C, customizable)
- Derives relative humidity, absolute humidity, volume ratio, mixing ratio, and dew point
- Cast aluminum housing with 316L stainless steel probe
- Pressure resistant to max. 4 bar
- 4-20mA analog output and RS485 digital interface
- Duct-mounted (thread/flange/clamp) or wall-mounted with extra probe installation
Overview
The DABECO DB442 transmitter is designed for fixed installation in industrial applications with conditions ranging from 0 to 100% RH and 0 to 200°C, with the probe able to survive exposure up to 200°C. Beyond its aluminum enclosure and 316L probe, a special condensation-resistant design lets the DB442 measure relative humidity, absolute humidity, temperature, volume ratio, mixing ratio, and dew point in high-moisture industrial environments — including textile printing and dyeing, papermaking, shaping and drying, tunnel drying, ceramic production, rubber production, steam pipelines, constant temperature test chambers, and hydrogen fuel cells. The DB440 series is available in different installation modes: direct duct mounting or wall mounting with an extra probe.
Working Principle
A condensation-resistant humidity and temperature sensing element housed in a 316L stainless steel probe is engineered to remain accurate even when exposed to repeated condensation cycles in high-moisture, high-temperature process air, deriving relative humidity, absolute humidity, volume ratio, mixing ratio, and dew point. Readings are transmitted via 4-20mA analog and RS485 digital outputs for duct or wall-mounted installation.
Applications
Benefits
- Condensation-resistant design maintains accuracy in cyclic high-humidity, high-temperature processes where standard sensors would drift or fail
- 316L probe and pressure-rated housing suit harsh industrial and lab environments
- Multi-parameter output (RH, dew point, absolute humidity, etc.) supports advanced process and climate chamber control
- Flexible mounting (duct or wall with probe) adapts to varied installation layouts
Technical Specifications
| Humidity Range | 0-100% RH |
|---|---|
| Temperature Range | -40 to 200°C (customizable) |
| Humidity Accuracy | ±2% RH (20-80% RH @ 25°C) |
| Temperature Accuracy | ±0.2°C (@ 25°C) |
| Humidity Repeatability | ±0.2% RH |
| Temperature Repeatability | ±0.1°C |
| Response Time (Humidity) | ≤15s |
| Response Time (Temperature) | 30s |
| Analog | 4-20mA |
|---|---|
| Digital | RS485 |
| Supply | 24V DC |
|---|---|
| Current Consumption | Max 80mA |
| Electrical Connection | Terminal block |
| Transmitter Working Temperature | -40 to 70°C |
|---|---|
| Pressure Resistance | Max. 4 bar |
| Housing Material | Cast Aluminium |
| Stem Material | 304 Stainless Steel |
| Probe Material | 316L Stainless Steel |
| Installation | Duct mounted (thread/flange/clamp) or wall mounted with extra probe |
| Stem Length | 400mm standard, up to 800mm |
|---|---|
| Cable Length (wall mount) | 1m standard, up to 3m |
| Probe Length | 150mm standard; 52mm and 87mm options |
Downloads
DatasheetPDF
Frequently Asked Questions
What warranty is offered on this product?
All Tetracon-supplied instruments carry the original manufacturer warranty (typically 12–24 months) plus first-line local support from our Islamabad service centre.
Do you provide installation and commissioning?
Yes. Our manufacturer-trained engineers offer on-site installation, commissioning and startup training anywhere in Pakistan.
Are spares and calibration available locally?
Common spares are held in local stock. Calibration is available at our lab or on-site with NIST-traceable reference standards.
How long is the typical lead time?
Stocked items ship within 3–5 working days; engineered configurations typically 6–10 weeks depending on manufacturer schedule.
Request a Quote — DB442 Condensation-Resistant Dew Point Humidity Transmitter (up to 200°C)
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