Optimize Nitrogen Systems with Temp&RH Sensor Solutions
In air separation nitrogen generation systems, high-purity gas output depends on more than just core
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Reliable OEM Partner for Dew Point Monitoring in Compressed Air, Gas, and Drying Systems
Designed for precision and durability, the HENGKO HG970 series offers a reliable dew point monitoring solution for demanding industrial environments. With high accuracy, fast response time, and robust stainless steel construction, the HG970 is ideal for continuous online measurement in compressed air systems, gas drying lines, and moisture-sensitive production processes. Whether you need analog or digital output, the HG970 series ensures stable performance and seamless integration into your control systems.
HG970 Series Dew Point Meter/ Temperature Humidity Selection Guide
| Modelo | Temperatura | Tipo de sonda | Aplicación | Features / Notes |
| HG970 | -30 ~ 80℃ | Sonda reemplazable | General-purpose monitoring in HVAC systems, laboratories, and industrial rooms | Standard model with easy-to-replace probe for regular maintenance |
| HG972 | -30 ~ 80℃ | Sonda redonda | Compact systems like environmental test chambers, storage cabinets, or small control boxes | Space-saving round probe for tight installations |
| HG984 | -30 ~ 80℃ | Sonda afilada OEM | OEM integration in compact equipment, sensor assemblies, or instrument panels | Custom sharp probe for embedded and OEM applications |
| HG983 | -30 ~ 100℃ | Sonda larga y afilada | Compressed air pipelines, drying ovens, and tank inlets | Extended reach probe ideal for insertion into ducts or deep ports |
| HG981 | -30 ~ 120℃ | Sonda larga OEM | Lithium battery drying rooms, petrochemical high-temp gas lines | Long and durable probe for harsh, high-temperature applications |
| HG982 | -30 ~ 120℃ | Sonda afilada dividida | Industrial dryers, heated air chambers, or environments with difficult access | Split design for easier installation and probe positioning |
HG970 Series
Portable Dew Point Meter HG970 – Precision in Your Pocket
The Portable Dew Point Meter is a lightweight, field-ready device designed for fast,
accurate humidity and dew point measurements in a wide range of environments.
*Compact & Portable – Ideal for mobile use in field inspections and remote sites
*High Accuracy – Advanced sensors ensure precise dew point readings
*Versatile Applications – Suitable for HVAC checks, industrial spot measurements, and environmental monitoring
*Rapid Response – Quickly adapts to changing conditions for real-time results
*User-Friendly Interface – Simple controls and clear display for effortless operation
*Durable & Lightweight – Built to withstand demanding field conditions without added bulk
*Essential Tool – A must-have for professionals requiring reliable moisture data on the go
HENGKO es líder mundial en soluciones de sensores industriales, con una reputación de diseño único y excelente rendimiento. Nuestros transmisores y sensores de temperatura y humedad se utilizan en una amplia gama de industrias, como la alimentaria y de bebidas, la farmacéutica, la manufacturera y la de control medioambiental.
Puede personalizar completamente un producto único de sensor de punto de rocío basado en nuestra serie de transmisores de punto de rocío patentados y de diseño propio.
Obtendrá un precio mucho más bajo y competitivo gracias a nuestro control extremadamente rentable.
Con nuestros productos, en constante actualización, satisfará siempre las cambiantes necesidades del mercado.
Obtendrá un fuerte apoyo de marketing para ayudarle a vender productos con éxito, el material de apoyo incluye: imágenes de alta resolución de productos, videos con efectos 3d, y mucho más.
Sensor de punto de rocío para monitor de sistema de aire comprimido : Garantiza un control óptimo de la humedad y la calidad del aire para su máquina de compresión de aire
HENGKO is a trusted manufacturer of high-performance dew point transmitters, temperature and humidity transmitters, and portable dew point meters.
We specialize in delivering a comprehensive range of monitoring solutions tailored to meet the precise needs of industrial and environmental applications.
Engineered for accuracy, durability, and long-term stability, our products ensure reliable performance across demanding conditions. Whether you’re looking for a precise dew point sensor or a rugged humidity transmitter, HENGKO offers both the technology and expertise to support your project.
👉 Contact us today to explore customized solutions that fit your monitoring challenges.
A Medidor del punto de rocío is a precision instrument used to measure the dew point temperature—the temperature at which moisture in the air or gas begins to condense into liquid water. It is a key parameter for understanding humidity levels y moisture content in various industrial and environmental applications.
Medidas dew point temperature in °C or °F
Indicates humidity saturation in air or gases
Helps detect moisture contamination in compressed air, gases, or controlled environments
| Tipo | Descripción |
|---|---|
| Portable Dew Point Meter | Handheld, used for spot-checks and field diagnostics |
| Online Dew Point Transmitter | Fixed installation, sends real-time data to control systems (e.g. 4–20 mA, RS485) |
| Mirror-type Hygrometer | Laboratory-grade, ultra-accurate but costly |
Prevents corrosion, condensation, and product defects
Ensures compliance with industry standards (ISO, GMP, etc.)
Enhances energy efficiency and equipment lifespan
Checking the dew point with the HG970 series portable dew point meter from HENGKO is a precise, efficient, and reliable process designed for both industrial field inspections and laboratory-quality measurements. The HG970 series offers various probe configurations to suit a wide range of applications, from general HVAC systems to high-temperature drying environments. Below is a step-by-step guide and technical overview of how the dew point measurement is conducted using this instrument.
The HG970 series includes multiple probe types (e.g., replaceable, sharp, long, split) and temperature ranges (-30°C to 120°C), allowing users to choose the most suitable model based on their measurement environment. For example:
HG970 / HG972: Ideal for general industrial and HVAC applications.
HG981 / HG982: Recommended for high-temperature environments (80–120°C), such as lithium battery drying rooms and gas pipelines.
Ensure the device is powered (via external power supply or field setup).
Connect the probe securely to the test point, pipe port, or environmental chamber.
For accurate results, avoid exposing the sensor to sudden humidity shocks or contaminants like oil or dust before the reading stabilizes.
Once connected, the HG970’s built-in sensing module continuously samples the air or gas, measuring parameters such as:
Dew Point Temperature (°C or °F)
Relative Humidity (%RH)
Ambient Temperature (°C/°F)
These values are calculated using HENGKO’s advanced polymer capacitive or ceramic sensor technology, offering fast response time y high accuracy even in dynamic or high-moisture environments.
If the model includes an LCD or digital interface (optional), the readings are displayed in real-time. For models without a display, the output is transmitted via:
Analog Signal (4–20 mA / 0–10 V)
Digital Communication (RS485 / Modbus-RTU)
These outputs can be logged via a data logger, PLC, or remote monitoring software.
The dew point temperature tells you the exact point at which condensation would occur under current pressure and humidity conditions. Lower dew points indicate drier air, which is critical for:
Preventing corrosion or moisture damage in pneumatic tools or compressed air systems
Maintaining strict humidity control in cleanrooms, dry rooms, or gas drying processes
For example:
Dew point < -40°C: Suitable for high-purity gas systems and lithium battery environments.
Dew point 0 ~ 10°C: Typical in HVAC, food storage, and general industrial applications.
To maintain reliable performance:
Calibrate the device periodically (typically once every 6–12 months) against a traceable standard.
Clean or replace the sensor probe as needed, especially if used in harsh or dusty environments.
Store the unit in a dry and clean place when not in use.
✅ Wide temperature and humidity range
✅ Interchangeable probe options for different environments
✅ Compact and robust construction for field use
✅ High accuracy and fast response time
✅ Optional OEM customization for unique industrial requirements
Contact HENGKO’s technical team at ka@hengko.com or visit www.hengkometer.com to get personalized advice based on your industry, installation method, and measurement conditions.
En HG970 series dew point transmitters from HENGKO are designed for industrial-grade dew point monitoring with high precision and stability. The normal dew point measurement range of the HG970 series is typically:
-60°C to +60°C Td (typical)
(Custom ranges available upon request)
| Parameter | Detalles |
|---|---|
| Typical Range | -60°C ~ +60°C dew point (Td) |
| Rango de humedad | 0%RH to 100%RH |
| Temperatura | -30°C to +120°C (varies by model, e.g., HG970 to HG982) |
| Tipo de sensor | Polymer capacitive or ceramic sensor (high accuracy, fast response) |
| Señal de salida | 4–20mA, 0–5V, 0–10V, RS485 / Modbus-RTU |
| Precisión | ±2°C Td typical (customizable based on sensor class) |
-60°C to -20°C Td: Ideal for compressed air drying systems, lithium battery dry rooms, or gas drying
-20°C to +20°C Td: Common in Sistemas de calefacción, ventilación y aire acondicionado, pharmaceutical environmentsy storage facilities
+20°C to +60°C Td: Suitable for high-moisture process areas, or climate chambers
If you need a customized dew point range, HENGKO can tailor the sensor configuration based on:
Target environment (dry gas, ambient air, high temp zone)
Accuracy requirement
Signal output preferences
📩 Contact: ka@hengko.com to request a custom specification or get technical support.
This is Great question!
Understanding the difference between punto de rocío y humedad is key to accurately evaluating air moisture content
—especially in industrial, HVAC, and environmental monitoring applications.
| Aspect | Punto de rocío | Humidity (Relative Humidity, %RH) |
|---|---|---|
| Definición | En temperatura at which air becomes fully saturated and water vapor condenses into liquid | En percentage of water vapor in the air compared to the maximum it can hold at a given temperature |
| Unit | °C or °F (Temperature) | %RH (Percentage) |
| Absolute/Relative? | Absolute measure of moisture content | Relative measure (depends on air temperature) |
| Temperature Dependent? | No – dew point is not affected by ambient temperature | Yes – higher temperatures can hold more moisture, affecting %RH |
| What it tells you | How dry or moist the air actually is | How close the air is to saturation at a given temperature |
| Used for | Precise control in drying, gas purity, industrial process monitoring | General comfort, climate control, environmental monitoring |
| Example | Dew point of -40°C = extremely dry air (used in lithium battery rooms) | 60%RH at 25°C = moderately humid air |
Punto de rocío = “How much water is really in the air?”
Relative Humidity = “How full is the air’s moisture tank at this temperature?”
| Ambient Temp | Punto de rocío | Relative Humidity |
|---|---|---|
| 25°C | 10°C | ~45%RH |
| 25°C | 20°C | ~75%RH |
| 25°C | 24°C | ~95%RH |
Utilice Punto de rocío for:
Compressed air drying systems
Inert gas monitoring (N₂, Ar, H₂)
Lithium battery dry rooms
Utilice %RH for:
Indoor air quality
HVAC system control
Agricultural storage
Even though the temperature is the same, the dew point increases with more water vapor in the air, which raises the relative humidity.
Both devices are used to measure the dew point temperature, a critical parameter in determining moisture levels in air or gas. However, they differ significantly in design, applicationy integration method.
| Aspect | Descripción |
|---|---|
| Measurement Function | Both measure dew point temperature accurately to detect moisture levels |
| Sensor Technology | Typically use similar capacitive or ceramic humidity sensors |
| Target Media | Both used with air, compressed gases, dry gases, etc. |
| Aplicaciones | Found in industrial, HVAC, environmental monitoringy gas drying |
| Feature / Aspect | Medidor del punto de rocío | Transmisor de punto de rocío |
|---|---|---|
| Form Factor | Portable or handheld | Fixed-installation / inline sensor |
| Display | Built-in LCD or digital display | Usually no display (or optional), outputs data to external systems |
| Power Source | Battery-powered or rechargeable | Externally powered (e.g., 24V DC) |
| Señal de salida | Internal data logging, USB export (optional) | Analog (4-20 mA, 0-10V) or Digital (RS485/Modbus-RTU) |
| Use Case | On-site spot checks, mobile inspections | Continuous online monitoring & automation systems |
| User Type | Technicians, maintenance staff | Engineers, system integrators, automation specialists |
| Instalación | Handheld use or temporary probe connection | Installed permanently in pipelines, dryers, tanks, etc. |
| Precios | Generally higher due to display and portability features | More cost-effective for long-term embedded use |
| Typical Examples | Vaisala DM70, Michell MDM300, HG970 series | HENGKO HG970, Vaisala DMT143, E+E EE371 |
| Scenario | Recommended Device |
|---|---|
| Field diagnostics and mobile inspections | Medidor del punto de rocío |
| Continuous monitoring in a compressed air line | Transmisor de punto de rocío |
| Temporary measurements in different locations | Medidor del punto de rocío |
| Integration into control/SCADA systems | Transmisor de punto de rocío |
Dew Point Meters are portable tools designed for manual measurements, great for spot-checking and troubleshooting.
Dew Point Transmitters are installed devices built for long-term, real-time monitoring y system automation.
La salida de 4-20 mA es una opción popular para los sensores de punto de rocío porque es una salida industrial estándar compatible con una amplia gama de sistemas de control. También es una salida muy fiable y resistente al ruido, lo que la hace muy adecuada para su uso en entornos industriales difíciles.
Estas son algunas de las ventajas de utilizar una salida de 4-20 mA para los sensores de punto de rocío:
Compatibilidad: La salida de 4-20 mA es compatible con una amplia gama de sistemas de control, incluidos PLC, DCS y sistemas SCADA. Esto facilita la integración de los sensores de punto de rocío en los sistemas de control existentes.
Fiabilidad: La salida de 4-20 mA es una salida muy fiable que no es susceptible a interferencias de ruido. Esto es importante para los sensores de punto de rocío, que suelen utilizarse en entornos industriales difíciles.
Precisión: La salida de 4-20 mA puede proporcionar mediciones precisas del punto de rocío. Esto es importante para aplicaciones en las que se requiere un control preciso del punto de rocío.
Alcance: La salida de 4-20 mA puede cubrir una amplia gama de valores de punto de rocío. Esto lo hace adecuado para una gran variedad de aplicaciones.
Coste: La salida de 4-20 mA es una salida relativamente barata de implementar. Esto la convierte en una opción rentable para los sensores de punto de rocío.
Además de las ventajas enumeradas anteriormente, la salida de 4-20 mA es también una salida muy versátil. Puede utilizarse para transmitir otros parámetros, como temperatura, presión y caudal. Esto la convierte en una salida valiosa para una amplia gama de aplicaciones industriales.
Estos son algunos ejemplos de aplicaciones en las que se suelen utilizar sensores de punto de rocío con salidas de 4-20 mA:
Sistemas de aire comprimido: Los sensores de punto de rocío se utilizan en sistemas de aire comprimido para supervisar y controlar el contenido de humedad del aire. Esto es importante para evitar la corrosión y otros daños en los equipos.
Sistemas de calefacción, ventilación y aire acondicionado: Los sensores de punto de rocío se utilizan en los sistemas de calefacción, ventilación y aire acondicionado para controlar los niveles de humedad de los edificios. Esto es importante para el confort y la salud de las personas.
Procesos de secado industrial: Los sensores de punto de rocío se utilizan en procesos de secado industrial para supervisar y controlar el contenido de humedad del producto que se está secando. Esto es importante para garantizar la calidad del producto.
Procesado de alimentos y bebidas: Los sensores de punto de rocío se utilizan en el procesado de alimentos y bebidas para controlar el contenido de humedad del producto procesado. Esto es importante para garantizar la seguridad y la calidad del producto.
Vigilancia medioambiental: Los sensores de punto de rocío se utilizan en estaciones de vigilancia ambiental para seguir los cambios en el contenido de humedad de la atmósfera. Esta información puede utilizarse para predecir las condiciones meteorológicas e identificar posibles problemas medioambientales.
Como puede ver, los sensores de punto de rocío con salidas de 4-20 mA son una valiosa herramienta para una amplia gama de aplicaciones industriales. Son fiables, precisos y versátiles, y pueden integrarse fácilmente en los sistemas de control existentes.
El precio de los transmisores de punto de rocío puede variar en función del fabricante, las características y la precisión del transmisor. En general, los transmisores de punto de rocío con mayor precisión y más funciones costarán más que los transmisores de punto de rocío con menor precisión y menos funciones.
Basándome en mis investigaciones, diría que el precio de los transmisores de punto de rocío suele ser justo. El coste de los componentes y la mano de obra necesarios para fabricar los transmisores de punto de rocío es elevado, y las empresas que los fabrican necesitan recuperar estos costes para seguir en activo. Además, los transmisores de punto de rocío se utilizan en diversas aplicaciones críticas, por lo que es importante que sean fiables y precisos. El elevado precio de los transmisores de punto de rocío refleja el hecho de que son instrumentos de alta calidad en los que se puede confiar para obtener mediciones precisas.
He aquí algunos factores que pueden influir en el precio de un transmisor de punto de rocío:
Aquí tienes una tabla con el rango de precios de los transmisores de punto de rocío del mercado:
| Tipo | Precios |
|---|---|
| Espejo refrigerado | $2,000 – $10,000 |
| Polímero | $500 – $2,000 |
| Óxido metálico | $500 – $1,500 |
Como puede ver, el rango de precios de los transmisores de punto de rocío puede variar en función del tipo de transmisor. Los transmisores de punto de rocío de espejo refrigerado son los más caros, pero también los más precisos. Los transmisores de punto de rocío de polímero y óxido metálico son menos caros, pero también son menos precisos.
El precio de los transmisores de punto de rocío también puede variar en función de las características del transmisor. Por ejemplo, los transmisores de punto de rocío con registro de datos, puntos de ajuste de alarma y capacidades de acceso remoto suelen costar más que los transmisores de punto de rocío con menos funciones.
Si buscas un transmisor de punto de rocío de alta calidad, te recomiendo que compres uno de una marca conocida que tenga buena reputación por su calidad y fiabilidad. También debe tener en cuenta las características que son importantes para usted y la precisión que necesita. Si no está seguro de cuál es el transmisor de punto de rocío más adecuado para usted, le recomiendo que consulte a un profesional que pueda ayudarle a tomar una decisión con conocimiento de causa.
some questions about Dew Point Meter you like to know
A Medidor del punto de rocío is a precision instrument used to measure the dew point temperature — the temperature at which air or gas becomes saturated with moisture and water vapor begins to condense into liquid.
It works by sensing the relative humidity and temperature of the environment or gas stream, then calculating the dew point based on the current saturation level. Most modern dew point meters use capacitive or ceramic sensors for real-time measurements, offering high accuracy and stability across a wide range of industrial applications.
Dew point measurement is critical for moisture control, especially in applications where excess humidity can lead to equipment failure, corrosion, product spoilage, or safety risks.
Industries such as sistemas de aire comprimido, pharmaceuticals, lithium battery manufacturing, semiconductorsy food packaging depend on dew point monitoring to ensure dry environments and gas purity. In compressed air lines, for example, a low dew point prevents water buildup, which could otherwise damage tools and contaminate end products.
Punto de rocío is the absolute temperature at which air becomes saturated and water vapor condenses, while humidity (usually relative humidity) is a percentage expressing how much moisture the air currently holds compared to its maximum capacity at a given temperature.
In simple terms:
Punto de rocío tells you how much moisture is actually in the air (in °C or °F).
Relative humidity tells you how close the air is to saturation (in %RH).
Dew point is more accurate for industrial applications, especially when monitoring drying processes or compressed air systems.
In industrial compressed air systems, the target dew point depends on the drying method y application sensitivity:
| Aplicación | Recommended Dew Point |
|---|---|
| General industrial use | -20°C to -40°C |
| Instrumentation or electronics | -40°C to -70°C |
| Medical/Pharma cleanrooms | ≤ -40°C |
| Standard shop air (non-critical) | 0°C to -10°C |
A lower dew point means drier air, which is essential for high-performance or sensitive operations. The dew point meter helps monitor this and ensure system compliance.
Yes. Most dew point meters — including advanced portable models — can be used to measure dew point in a variety of non-corrosive gases, such as nitrogen (N₂), argon (Ar), carbon dioxide (CO₂)y compressed natural gas (CNG).
However, it is important to verify:
Sensor compatibility with the target gas
Pressure rating of the probe or housing
Flow regulation to avoid sensor contamination
Some models, like the HENGKO HG970 series, offer custom probe materials and protective filters for specialized gas monitoring applications.
For most industrial and professional uses, dew point meters should be calibrated every 6 to 12 months, depending on usage frequency, environmental conditions, and accuracy requirements.
Regular calibration:
Ensures data reliability
Maintains regulatory compliance (e.g., ISO, GMP)
Extends the lifespan of the sensor
HENGKO and other manufacturers often offer traceable calibration services and replacement sensors for field units.
Typical high-quality portable dew point meters can measure within a range of:
-80°C to +60°C (or -112°F to +140°F)
For example, the HG970 series by HENGKO is commonly used to monitor dew point ranges from -60°C to +60°C, making it suitable for most industrial air and gas drying applications. Some lab-grade mirror hygrometers may extend lower, but portable models balance range with portability and cost-effectiveness.
Using a portable dew point meter is straightforward:
Power on the device (battery or external power).
Connect the probe to the sample point or open environment.
Allow stabilization time (usually 30 seconds to a few minutes).
Observe the real-time dew point reading on the display or via signal output.
Log or export data if required (some models offer USB or Bluetooth).
Always make sure the sensor is clean, calibrated, and not exposed to oil, dust, or corrosive chemicals.
A Medidor del punto de rocío is portable and often used for spot-checking or mobile diagnostics.
A Transmisor de punto de rocío is a fixed, inline sensor installed for continuous monitoring in automated systems.
Dew point meters typically include a display and internal battery, while transmitters are integrated with PLCs or data loggers via analog (4-20mA) or digital (RS485/Modbus) output.
Yes — if it’s rated for industrial or field use. Look for:
IP-rated housing for dust and moisture protection
Stainless steel probe construction
Temperature range compatibility (e.g., -30°C to +120°C)
Shock-resistant casing
Models like the HENGKO HG970 series are designed for demanding conditions, including outdoor gas lines, drying towers, or factory production lines.
Póngase en contacto con HENGKO hoy mismo para cualquier pregunta sobre el sensor, transmisor y solución de temperatura y humedad
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