Humidity Generator Archives | Instrumentation Engineering Services Ltd. https://ieslbd.com/product-tag/humidity-generator/ Accredited calibration laboratory, accredited inspection body and instrument supplier Sat, 25 Oct 2025 08:42:05 +0000 en-US hourly 1 https://wordpress.org/?v=6.9 https://ieslbd.com/wp-content/uploads/2021/04/icon-150x150.png Humidity Generator Archives | Instrumentation Engineering Services Ltd. https://ieslbd.com/product-tag/humidity-generator/ 32 32 BL798 Humidity & Temperature Probe https://ieslbd.com/service/bl798-humidity-temperature-probe/ https://ieslbd.com/service/bl798-humidity-temperature-probe/#respond Sat, 25 Oct 2025 08:42:05 +0000 https://ieslbd.com/?post_type=product&p=12451
Accuracy ±1.0%RH; 0.6℃
Range 0…100%RH, -40℃…+180℃

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]]> The BL798 is a rugged, accurate temperature and relative humidity probe. It measures relative humidity over the range of 0 to 100% RH and temperature over the range of -40°C to +160°C. Alternatively, the range can expanded from -40°C to +180°C.

FEATURES

  • RH accuracy up to 1.0%RH
  • Temperature accuracy up to 0.6℃
  • Temperature measuring range -40…+180℃
  • Full 0…100%RH measure, +80℃ measure
  • Modbus RTU over RS-485
  • Easy Installation and connection
  • Sensor purge improves long-term stability and chemicalresistance

APPLICATION

  • Industrial applications where periodic recalibration alone is not sufficient for maintaining the probe performance.
  • Industrial HVAC systems, cleanrooms, and environmental chambers.

SPECIFICATION

Relative Humidity Measurement

  • Sensor type: Thin film capacity
  • Range: 0…100%RH
  • Accuracy @23℃: ±1.0%RH (0…90%RH)
  • T63 response time: 20 seconds
  • Uncertainty: ±0.6%RH (<40%RH); ±1%RH (40…95%RH)

Temperature Measurement

  • Sensor type: Pt100 RTD1/3 Class B IEC751
  • Range: -40℃…+160℃, -40℃…+180℃ (option)
  • Accuracy @23℃: ±0.6℃ (<40%RH), ±1℃(40…95%RH)
  • Calibration uncertainty: ±0.1℃

Operating Environment

  • Operating temperature of probe head: -40℃…+160℃, -40℃…+180℃ (option)
  • Operating temperature of probe body: -40℃…+60℃
  • Storage temperature: -40℃…+80℃
  • Operating environment: Suitable for outdoor use
  • Measurement environment: For air, N2， H2，Ar, He, O2
  • IP rating of probe body: IP66

Input and Output

  • Operating voltage: 18 to 28VDC
  • Current consumption: 10mA typical, 500m max
  • Digital Output: RS485, non-isolated
  • Protocols: Modbus RTU

Mechnical infos:

  • Connector: M12-pin A-coded male
  • Weight: 250g
  • Probe cable length: 2 meter
  • Probe material: 316L
  • Probe body material: 316L
  • Cable jacket material: FEP

SCOPE OF DELIVERY

  • Humidity & temperature probe w/ 2m cable
  • Analog part

OPTIONAL ACCESSORIES AND SERVICCE

  • ISO17025 accredited calibration certificate   (CAL-798)
  • BL7330 temperature & humidity transmitter (BL7330)
  • Chemical purge function (798-CP)

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]]> https://ieslbd.com/service/bl798-humidity-temperature-probe/feed/ 0 BL7330 Humidity & Temperature Transmitter https://ieslbd.com/service/bl7330-humidity-temperature-transmitter/ https://ieslbd.com/service/bl7330-humidity-temperature-transmitter/#respond Sat, 25 Oct 2025 08:24:16 +0000 https://ieslbd.com/?post_type=product&p=12443 Temperature & Humidity Transmitters are a device that measures and transmits temperature and humidity data to a central monitoring system, making it an essential tool for many industries. FEATURES Supports RH%, ℃, dew point, CO2 measure Full 0…100%RH measure, +80℃ measure Pressure tolerance is up to 100bar (depends) Alarm output, analog output, RS485 output, Relay […]

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]]> Temperature & Humidity Transmitters are a device that measures and transmits temperature

and humidity data to a central monitoring system, making it an essential tool for many

industries.

FEATURES

  • Supports RH%, ℃, dew point, CO2 measure
  • Full 0…100%RH measure, +80℃ measure
  • Pressure tolerance is up to 100bar (depends)
  • Alarm output, analog output, RS485 output, Relay output, Modbus (RTU/TCP) protocol
  • Corrosion-resistant IP65 housing, excellent performance in harsh environment
  • Interchangeable stainless steel probe, connection various brand probes possible

APPLICATION

  • HVAC Systems
  • Agriculture industry
  • Food storage and pharmacy industry
  • Labs and clean room
  • Weather Stations
  • Industrial Processes, such as automotive, chemical, and petrochemical industries. 

    SPECIFICATION

    • Supply Power: 9…36VDC, 24VDC
    • Analog current output: 0…20mA, 4…20mA
    • Analog voltage output: 0…5V, 0…10V
    • Digital output: RS485
    • Protocols: Modbus (RTU/TCP)
    • Relay output (x 2): NO/NC, DC 24V 1A
    • Interchangeable probe types: Temperature & humidity probe, temperature probe, dew point probe, CO2 probe

    Relative Humidity Measurement

    • Range: 0…100%RH
    • Accuracy @23℃:, ±1.0%RH (10…90%RH); ±2.0%RH (<10%RH); ±3.0%RH (>90%RH)
    • Long term stability: <±2.0%RH in two years

    Temperature Measurement

    • Range: -40℃…+80℃, -70℃…+180℃ (depend models)
    • Accuracy: 0.2℃ (0 to 40℃); 0.3℃ (-40 to 0℃, 40 to 80℃)
    • Long term stability: < ±0.1℃in two years
    • Temperature sensor: Pt1000 RTD1/3 Class B IEC 751

    Dew Point Measurement

    • Range: -100…0℃Td, -60…+60℃ Td (depend models)
    • Accuracy ensured in 0…40℃:   ±0.2℃ Td

    CO2 Measurement

    • Range: 0…10000ppm, 0…20%vol
    • Accuracy:   depend connection sensor models

    Mechanical and other parameters

    • Working Environment: -40℃…+60℃, 0…100%RH
    • Storage temperature: -40℃…+80℃
    • Housing material: Aluminium oxidation
    • Ingress protection level: IP65
    • Probe protection: Stainless steel sintered filter
    • Display: 3.2 inch colour LCD,   No display (option)
    • Dimension: 160mm (L) x 115mm (H)   x 55mm (D)
    • Weight: 500g
    • Installation: Wall mounting, Direct pole Installation
    • Electric connection: M16 x 1.5, on terminals
    • EMC: Complies with EN61326-1 EMC standards

    SCOPE OF DELIVERY

    • BL7330 temperature & humidity transmitter w/ one channel
    • 100-240VAC to 24V-1A DC adapter
    • Cable gland x 2

    OPTIONAL ACCESSORIES AND SERVICES

    • Humidity & temperature probe w/ 2m cable (SN:BL798)
    • ISO17025 accredited calibration certificate   (SN: 9000-7330)
    • Upgrade two channels and four slots output (SN: 7330-2C)
    • Wall mounting fitting (SN: 7330-WMF )

    HOW TO ORDER

    • BL7330-LED: with LED display
    • BL7330-B: without display (Blank)

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]]> https://ieslbd.com/service/bl7330-humidity-temperature-transmitter/feed/ 0 BL783 Chilled Mirror Hygrometer https://ieslbd.com/service/bl783-chilled-mirror-hygrometer/ https://ieslbd.com/service/bl783-chilled-mirror-hygrometer/#respond Wed, 22 Oct 2025 09:35:17 +0000 https://ieslbd.com/?post_type=product&p=12423 Chilled mirror hygrometry is a precise technique for determining the water vapor content is gases by directly measuring dew point or frost temperatures. Using this technique a metal mirror is cooled until it reaches a temperature at which a thin layer of condensation begins to form on it. The dew layer is detected optically, and the mirror is held at that temperature. The mirror temperature, measures with a PRT, is an accurate indicator of the dew or frost point.

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]]>

Chilled mirror hygrometry is a precise technique for determining the water vapor content is gases by directly measuring dew point or frost temperatures. Using this technique a metal mirror is cooled until it reaches a temperature at which a thin layer of condensation begins to form on it. The dew layer is detected optically, and the mirror is held at that temperature. The mirror temperature, measures with a PRT, is an accurate indicator of the dew or frost point.

 

FEATURES

  • Dew point measure range -40℃ to +90℃
  • Accuracy of dew point is   ±0.15 ℃
  • Dynamic balance control for contamination
  • Simultaneously measures dew point, temperature, relative humidity, absolute humidity, specific humidity, enthalpy, vapor pressure and volume ratio (ppmV).
  • Real time data logging and display curve
  • MAX value and MIN value are recorded
  • AC or alternative DC power supply
  • MODBUS RTU and USB communication
  • 4 Inch touch screen
  • External temperature sensor port
  • Force frost function at low dew points

APPLICATION

  • Reference standard in calibration lab
  • Inlet air measurement for engine testing
  • Heating ventilation and air conditioning test
  • Environment monitoring in clean room
  • Humidity control for metallurgical processes
  • Coating process monitoring in pharmacy
  • Reference humidity instruments for climatic and environmental chambers

SPECIFICATION

  • DP/FP ranges: -40℃ to +90℃, (0.55%~100%RH @20℃)

    DP/FP accuracy: ±0.15℃ (calibration: -15℃ to +20℃)

    DP/FP resolution: 0.01℃

    DP/FP reproducibility error: ±0.05℃

  • Temperature range: -45℃ to +100℃

    Temperature accuracy: ±0.05℃ (calibration: -10℃~60℃)

    Temperature resolution: 0.01℃

    Temperature reproducibility error: ±0.05℃

  • Working environment: -20℃ to +60℃, 10%RH to 90%RH, 101.325kPa (custom atm. is option)
  • Mirror temperature measurement: 4 wire PT100 1/3B
  • Probe material: SUS304 stainless steel
  • Cable material: Polyurethane material with shielding layer
  • Response time: Max cooling 0.8℃/s, + 15s balance time
  • Sampling airflow rate: 0.1~1NL/min (The volume of ventilation is inversely proportional to the dew point)
  • Cooling type: Peltier cooling
  • Output signal: Modbus RTU, USB
  • Power supply: 100-240V AC 35W or USB Type-C 5V/2A 10W
  • Ingress protection grade: IP54
  • Dimension: 160mm (W) x 165mm (D) x 85mm (H)
  • Weight: 4kg inlcudes standard accessories

 

SCOPE OF DELIVERY

  • BL783 Precision chilled mirror hygrometer
  • Two Stage Chilled Mirror Dew Point Sensor
  • Temperature sensor
  • 2 meters dew point sensor connection cable
  • 2 meters temperature sensor connection cable
  • USB2.0 into USB type-C cable
  • Standard AC Power cord
  • User manual
  • Factory calibration report
  • Carrying case

OPTIONAL ACCESSORIES AND SERVICES

  • ISO17025 accredited calibration certificate

HOW TO ORDER

  • BL783-220V
  • BL783-110V

 

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]]> https://ieslbd.com/service/bl783-chilled-mirror-hygrometer/feed/ 0 BL765 Humidity Generator (5~95%RH) https://ieslbd.com/service/bl765-humidity-generator-595rh/ https://ieslbd.com/service/bl765-humidity-generator-595rh/#respond Wed, 22 Oct 2025 03:48:35 +0000 https://ieslbd.com/?post_type=product&p=12370 Stability ±0.1%RH
Accuracy ±1%RH uncertainty
Range 5%RH~95%RH, 5℃~50℃

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]]> The BL765 is a bench-top humidity generator for calibrating a large workload of probes in the laboratory or on site in the field. The system comprises a humidity and temperature controlled chamber that can house up to six humidity sensors. The BL765 works by time-proportioning the flows of dry and saturated air according to the pre-selected relative humidity value. The chamber temperature is controlled by a four-zone Peltier heat pump arrangement for maximum stability and minimum temperature gradient. The saturator assembly can be filled easily with the distilled water reservoir at the front of the unit and the easily accessible desiccator can be re-charged by heating when required.

FEATURES

  • 5%-95%RH humidity range, temperature range 5℃-50℃
  • Better than ±1.0%RH and 0.1℃ uncertainty for dependable humidity probe calibration
  • Rapid humidity and temperature stabilization time, much faster than traditional two-pressure generator.
  • 2.4L chamber, 1.6L effective work volume
  • Program 6 multi-points calibration
  • Compact size and lightweight
  • Modular design, maintenance free
  • Touch screen operation

APPLICATION

  • Test and calibration laboratory
  • Pharmaceutical and biomedicine
  • Automobile manufacturing industry
  • Food industry
  • Dust free workshop

     

    SPECIFICATION

    • Control sensor: HygroClip2-S, PT100
    • Humidity measurement range:   5…95%RH   @23±2℃
    • Temperature measurement range: 5 … 50 ℃ (Environment temperature is not more than 23 ± 1℃ while chamber temperature is set at 5℃ )
    • Humidity stability: < ±0.1%RH
    • Temperature stability: < ±0.02℃
    • Humidity ramp/soak changes:   < 10 minutes (5…95%RH)
    • Temperature changes: < 10 minutes (20 to 50℃), < 20 minutes (20 to 5℃)
    • Typical calibration uncertainty (k=2): ±1.0%RH @ 20℃,   ±0.10℃ @ 5…95%RH
    • Uniformity: ±0.3%RH @ 23℃,   ±0.10℃ @ 23℃
    • Resolution: ±0.1%RH,   ±0.1℃
    • Ports size on the door: 1xΦ12, 7xΦ15, 2xΦ30, 2xΦ50mm
    • Maximum Calibration probes: 8 pcs
    • Water level observation: Front panel window
    • Request water: 80ml – 120ml distilled water
    • Gas connection: Input and output on rear side
    • Desiccant type: Molecular Sieve (screen shows lack)
    • Chamber volume: 3L, effective working volume is 1.6L
    • Communication ports: RS485
    • Power supply: 220VAC 60Hz 3A   (110V is optional)
    • Dimension: 475mm L x 360mm W x 240mm D
    • Weight: 15 kg
    • Operation environment: 10°C to 35°C, < 80%RH

     

     

    SCOPE OF DELIVERY

    • BL765 Humidity generator
    • Square door with 8 ports (1xΦ12, 7xΦ15, 2xΦ30, 2xΦ50mm)
    • Desiccant cartridge
    • Fill syringe
    • Power cord
    • User manual
    • Metal Carrying case with wheels and handle

    OPTIONAL ACCESSORIES AND SERVICES

    • ISO17025 accredited calibration certificate (CAL-765)
    • Desiccant cartridge with desiccant material (765-DC)
    • Transparent window for transmitter w/o probe (765-TW)
    • Door with custom ports from Φ6mm to Φ50mm (765-CP)

    ORDERING MODEL NUMBER

    • BL765-220V
    • BL765-110V

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