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Corrosion-Resistant Dew Point Transmitter for Harsh Chemical Environment with 316L Stainless Steel Probe, 4-20mA, RS485, 0-5V, 0-10V Output

Número do item:  HG808-G series

HG808-G Corrosion-Resistant Dew Point Transmitter

O HG808-G is an industrial-grade dew point and temperature transmitter specifically engineered for corrosive or chemically aggressive environments. Built with a 316L stainless steel sintered probe and a sealed aluminum housing, it ensures stable and accurate measurement even in the presence of acidic gases, solvents, salt spray, or oil mist.

In addition to measuring and transmitting dew point and temperature, the HG808-G can calculate and output relative humidity and PPM values, providing a comprehensive view of ambient moisture conditions for process control and quality assurance.

Veja a seguir um detalhamento dos principais recursos:

  • Corrosion-Resistant Design: 316L stainless steel probe with nano-coated anti-corrosion finish, suitable for acidic, alkaline, and solvent vapors.

  • High Accuracy: ±3 °C Td dew point accuracy across a range of –80 °C to +60 °

  • Wide Power & Pressure Range: Operates on DC 12 – 24 V, withstands up to 10 bar pressure.

  • Flexible Output Options:

    • RS485 (Modbus-RTU) digital output

    • Saída analógica de 4-20 mA

    • Optional 0-5 V / 0-10 V analog outputs

  • Industrial Protection: IP65-rated enclosure, anti-condensation heating, and strong EMI resistance for reliable long-term use.

  • Integration-Ready: Easily connects to PLCs, DCS, or SCADA systems for automated dew point monitoring and process control.

ESPECIFICAÇÃO

Destaques do produto:

▪Engineered for Harsh Chemical Environments
Built with 316L stainless steel and anti-corrosion coating to withstand acids, alkalis, solvents, and salt mist. Ideal for chemical, pharmaceutical, and lithium-battery industries.
▪High Accuracy Dew Point Monitoring
Provides ±3 °C Td accuracy over a wide range (–80 °C to +60 °C), ensuring precise control in ultra-dry or low-humidity processes.
▪Comprehensive Measurement Capability
Simultaneously measures and outputs dew point, temperature, humidity, and PPM values, giving a full picture of environmental moisture conditions.
▪Flexible Output Options
Supports RS485 (Modbus-RTU) digital communication, plus 4–20 mA, 0–5 V, and 0–10 V analog signals for easy integration with PLC, DCS, and SCADA systems.
▪Industrial-Grade Reliability
IP65 aluminum housing with anti-condensation function, resistant to oil, dust, and high humidity for stable long-term operation under 10 bar pressure.
▪Compact and Service-Friendly Design
Modular structure with replaceable sintered probe, simplifying installation and reducing maintenance time and cost.
▪Wide Power Supply Range
Operates on 12–24 V DC with reverse-polarity and surge protection for reliable use in demanding industrial environments.

HG808-G Data Sheet Details

Here’s a specification details for the HG808-G series Humidity Transmitter :

CategoriaEspecificação
Measurement ParametersDew Point, Temperature, Humidity, PPM (for reference)
Faixa de ponto de orvalho–60 °C ~ +20 °C
Precisão do ponto de orvalho±3 °C Td (±5.4 °F)
Faixa de temperatura–20 °C ~ +60 °C
Precisão de temperatura±0.2 °C (@ 23 °C)
Temperature Long-Term Stability≤ 0.1 °C / year
Humidity Long-Term Stability≤ 1 % RH / year
Digital OutputRS485 (Modbus-RTU); outputs temperature, humidity, dew point, PPM (humidity & PPM for reference only)
Saídas analógicasTemperature + Dew Point – select one: 4-20 mA / 0-5 V / 0-10 V
Resistência à pressão≤ 16 bar
Taxa de transmissão1200, 2400, 4800, 9600, 19200, 115200 bps (selectable; default 9600 bps)
Frequência de aquisiçãoFastest response 1 second; adjustable via PLC
Working Environment–20 °C ~ +60 °C; 0 % ~ 95 % RH (non-condensing)
Fonte de alimentaçãoDC 12 V ~ 24 V, reverse-polarity protected
Consumo de energia< 0.5 W
Output ProtocolStandard Modbus-RTU; compatible with PLC, DCS, and SCADA systems
ConstruçãoCompact aluminum housing with industrial grade ESD & anti-reverse protection
Installation & CustomizationCustom probe design available according to application needs (structure, shape, length, material, mounting method)
Protection RatingIP65 – dustproof and moisture-resistant
Applicable Probe Options

Two probe types available:

• Gas Sampling Unit

• 316L Stainless Steel Sintered Protective Housing

(A-Type, 0A# / 8A#)

Lista de itens da sonda HG808 #3

Oferecemos 6 tipos de sondas para o Transmissor de Umidade HG808, com cada tipo disponível nas versões A e B, fornecendo um total de 12 sondas para várias opções de aplicação.

Sonda de umidade da série A

Sonda de umidade de aço inoxidável poroso tipo A

0A#

Sonda de umidade #A8 para transmissor de umidade

8A#

Conector da sonda

Opção de conector de sonda
Sonda de umidade de aço inoxidável com rosca hexagonal M20

Conector de sonda de aço inoxidável com rosca hexagonal M20

G1/2 Sonda de umidade de aço inoxidável com rosca hexagonal

G1/2 Conector de sonda de aço inoxidável com rosca hexagonal

NTP1/2 Sonda de umidade de aço inoxidável com rosca hexagonal

NTP1/2 Conector de sonda de aço inoxidável com rosca hexagonal

Sonda de umidade de aço inoxidável com rosca hexagonal M27

Conector de sonda de aço inoxidável com rosca hexagonal M27

Sonda de umidade de aço inoxidável com flange M20

Conector de sonda de aço inoxidável com flange M20

Sobre a instalação

Diagrama de conexão dos fios do transmissor de temperatura e umidade de 4-20 mA

Diagrama de conexão dos fios do transmissor de temperatura e umidade de 4-20 mA

Diagrama de conexão de fios do transmissor de temperatura e umidade de 0-10v

Diagrama de conexão de fios do transmissor de temperatura e umidade de 0-10v

Diagrama de conexão de fios do transmissor de temperatura e umidade de 0-5v

Diagrama de conexão de fios do transmissor de temperatura e umidade de 0-5v

Diagrama de conexão dos fios de cada cor Transmissor de umidade HG808

Padrão de fiação do tipo de saída analógica 4-20mA + RS485

Cor da linhaDefiniçãoEspecificação
Cabo de alimentação  
VermelhoFonte de alimentação positiva10 ~ 30V CC
PretoNegativo da fonte de alimentaçãoGND
Linhas de saída analógica  
MarromSinal de temperatura positivoSaída de 4-20mA
AzulSinal de temperatura negativoConecta-se ao preto (GND)
CinzaSinal de umidade positivoSaída de 4-20mA
BrancoSinal de umidade negativoConecta-se ao preto (GND)
Fiação RS485  
AmareloRS485ACabo de par trançado
VerdeRS485BCabo de par trançado

Observações adicionais:

  • Capacidade de carga:
    • Saída de corrente: ≤ 600Ω
    • Saída de tensão (não aplicável nesta tabela): ≤ 250Ω
 
  • Modelos aplicáveis: Todas as séries HG808
 

Importante:

  • Consulte o manual do dispositivo para obter instruções específicas de conexão e quaisquer requisitos adicionais.
  • Certifique-se de que os resistores de terminação adequados sejam usados no barramento RS485, conforme o manual do dispositivo e os padrões de comunicação relevantes.
  • Não tente fazer a fiação elétrica sem o conhecimento e as qualificações adequadas.
  •  

APLICAÇÃO

Typical Applications – HG808-G Corrosion-Resistant Dew Point Transmitter

1. Lithium Battery Electrolyte Filling / Electrode Coating

Precise dew point and humidity monitoring is critical to prevent moisture contamination of electrolyte solutions e ensure uniform electrode coating quality.

  • Typical conditions: Dew point ≤ –40 °C, temperature 20 – 30 °C, humidity < 1 % RH.

  • Control requirement: Continuous online dew point monitoring in glove boxes and drying chambers for ultra-low humidity environments.

2. Chemical Reactors & Solvent Recovery Pipelines

During chemical synthesis or solvent recovery, excessive moisture can affect reaction yield, purity, and safety. The HG808-G provides stable measurements even in acidic, solvent, or oil-vapor atmospheres.

  • Typical conditions: Dew point –40 ~ 0 °C, temperature 25 – 60 °C, humidity 5 – 40 % RH.

  • Control requirement: Corrosion-resistant dew point monitoring under HF, HCl, NH₃, or VOC exposure to prevent condensation and corrosion.

3. Pharmaceutical Raw Material Drying

Humidity and temperature stability are essential to maintain API potency and drying uniformity. The HG808-G ensures accurate dew point and temperature control in cleanrooms and drying ovens.

  • Typical conditions: Dew point –30 ~ +10 °C, temperature 40 – 80 °C, humidity 2 – 20 % RH.

  • Control requirement: Real-time humidity feedback to optimize drying cycles and ensure GMP-compliant environmental monitoring.

4. Flue Gas Desulfurization (FGD) Towers

FGD processes involve high-temperature, corrosive gases with varying moisture content. The HG808-G’s 316L stainless-steel probe withstands SO₂/SO₃ and acid mist for long-term reliability.

  • Typical conditions: Temperature 60 – 120 °C, humidity 10 – 80 % RH, dew point 0 ~ 50 °C.

  • Control requirement: Dew point monitoring for condensation control and corrosion prevention in gas treatment systems.

5. Industrial Exhaust Gas & Emission Treatment

Stable dew point monitoring is required to prevent pipeline condensation, corrosion, and particulate accumulation in emission control systems.

  • Typical conditions: Temperature 30 – 90 °C, dew point –20 ~ 40 °C, humidity 5 – 70 % RH.

  • Control requirement: Continuous dew point trend tracking to maintain safe moisture levels before gas filtration or catalytic processing.

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FAQs

1. What makes the HG808-G suitable for corrosive industrial environments?

The HG808-G is engineered with an integrated corrosion-resistant structure, using 316L stainless steel and a sealed cast-aluminum housing (IP65). It resists acids, alkalis, electrolyte vapors, and chemical solvents, making it ideal for lithium battery, chemical, and pharmaceutical applications where standard sensors fail.

2. How durable is the HG808-G under harsh operating conditions?

This transmitter has undergone strict testing for oil-gas mixtures, chemical corrosion, and dust impact. Its IP65-rated aluminum enclosure e pressure-resistant 316L probe can withstand up to 16 barras, ensuring long-term stability and reliability even in challenging process environments.

3. What output and communication options does the HG808-G support?

The HG808-G offers flexible signal outputs for easy system integration:

  • Digital: RS485 (Modbus-RTU) for dew point, temperature, humidity, and PPM values.

  • Analog: Dual-channel outputs of 4-20 mA, 0-5 V, or 0-10 V (user selectable).
    This design allows seamless connectivity with PLC, DCS, or SCADA systems for automated dew point and temperature control.

4. Can the HG808-G record and analyze measurement data?

Yes. The transmitter includes data-recording functionality and supports connection to backend analysis software. Users can generate reports and trend charts with one click, enabling efficient monitoring, traceability, and process optimization.

5. What parameters can the HG808-G measure simultaneously?

The HG808-G can output dew point temperature, process temperature, relative humidity, and PPM values at the same time—providing a complete picture of gas dryness and system conditions.

6. How does the HG808-G compare to imported dew point transmitters?

By integrating advanced sensor technology and optimized circuitry, the HG808-G matches the performance of imported brands at a significantly lower cost. It delivers high precision, strong corrosion resistance, and excellent long-term stability, helping customers reduce maintenance and procurement costs.

7. Is customization available for different installation conditions?

Yes. HENGKO offers customized probe designs (structure, length, material, and mounting method) to meet specific process requirements—ensuring accurate and stable dew point measurement under any industrial condition.

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