Dew Point Hygrometer | ThermoFlux - 7089
Product Overview
The Dew Point Hygrometer ThermoFlux - 7089 is a laboratory trainer that measures air humidity using four instruments housed inside a single climatic chamber with a transparent door. It covers psychrometric, hygrometric, and capacitive measurement methods using two mechanical instruments (hair hygrometer with real hair and synthetic fiber) and three electronic instruments (capacitive sensor and wet and dry bulb thermocouples). Chamber humidity is controlled via an ultrasonic atomizer (22 W) for humidification and a Peltier element (58 W cooling capacity, 1600 mm² cooling surface) for dehumidification. This dew point hygrometer enables direct instrument comparison and supports optional PC-based data acquisition using LabVIEW-based DAQ software.
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Technical Specifications
Dew Point Hygrometer ThermoFlux - 7089, Technical Specifications
| Parameter | Value |
|---|---|
| Humidifier Type | Ultrasonic atomizer |
| Humidifier Power Consumption | 22 W |
| Humidifier Safety Feature | Low water cut-off |
| Dehumidifier Type | Peltier element |
| Dehumidifier Cooling Capacity | 58 W at 50°C ambient temperature |
| Dehumidifier Cooling Surface | 1600 mm² |
| Hair Hygrometer (Real Hair) Measuring Range | 0 to 100% RH / -35°C to 65°C |
| Hair Hygrometer (Synthetic Fiber) Measuring Range | 0 to 100% RH / 0°C to 70°C |
| Capacitive Sensor Output Voltage | 0 to 10 V |
| Capacitive Sensor Measuring Range | 0 to 100% RH |
| Dry and Wet Bulb Thermocouple Measuring Range | -100 to 400°C |
Technical Data
Humidifier
| Parameter | Value |
|---|---|
| Type | Ultrasonic atomizer |
| Safety Feature | Low water cut-off |
| Power Consumption | 22 W |
Dehumidifier
| Parameter | Value |
|---|---|
| Type | Peltier element |
| Cooling Capacity | 58 W (at 50°C ambient temperature) |
| Cooling Surface | 1600 mm² |
Hair Hygrometer with Real Hair
| Parameter | Value |
|---|---|
| Humidity Measuring Range | 0 to 100% RH |
| Temperature Measuring Range | -35°C to 65°C |
Hair Hygrometer with Synthetic Fiber
| Parameter | Value |
|---|---|
| Humidity Measuring Range | 0 to 100% RH |
| Temperature Measuring Range | 0°C to 70°C |
Capacitive Sensor with Digital Display
| Parameter | Value |
|---|---|
| Output Voltage | 0 to 10 V |
| Measuring Range | 0 to 100% RH |
Dry and Wet Bulb Thermocouple
| Parameter | Value |
|---|---|
| Measuring Range | -100 to 400°C |
Key Features
Key Features
- Dew Point Hygrometer Configuration: Four humidity measurement instruments in one climatic chamber
- Mechanical Instruments: Hair hygrometer with real hair, hygrometer with synthetic fiber
- Electronic Instruments: Capacitive humidity sensor, wet and dry bulb thermocouples
- Measurement Methods Covered: Psychrometric, hygrometric, capacitive
- Climatic Chamber: Transparent door, adjustable humidity
- Humidification: Ultrasonic atomizer, 22 W, with low water cut-off
- Dehumidification: Peltier cooling element, 58 W cooling capacity at 50°C ambient
- Cooling Surface: 1600 mm²
- Air Circulation: Recirculation fan for uniform air mixing
- Hair Hygrometer (Real Hair) Range: 0 to 100% RH, -35°C to 65°C
- Hair Hygrometer (Synthetic Fiber) Range: 0 to 100% RH, 0°C to 70°C
- Capacitive Sensor Range: 0 to 100% RH, output 0 to 10 V
- Wet and Dry Bulb Thermocouple Range: -100 to 400°C
- Direct Instrument Comparison: All four instruments readable simultaneously under identical conditions
- PC Connectivity: Optional DAQ software with electronic sensors included
- Software Environment: National Instruments LabVIEW, Windows compatible
Experiments
- Measuring methods for air humidity measurement:
- Psychrometric humidity measurement
- Hygrometric humidity measurement
- Capacitive humidity measurement
- Characteristic variables to describe air humidity
- Changes of the state of humid air in the h-x diagram
Construction and Design
The Dew Point Hygrometer ThermoFlux - 7089 is constructed around a climatic chamber with a transparent door as its core element. The chamber houses all four humidity measurement instruments, enabling simultaneous readings under identical conditions. An ultrasonic atomizer rated at 22 W with a low-water cut-off provides humidification. A Peltier cooling element with a 58 W cooling capacity and 1600 mm² cooling surface performs dehumidification. A recirculation fan circulates air within the chamber to maintain uniform mixing throughout all measurements.
Two mechanical instruments are included: a hair hygrometer using real hair and a hygrometer using synthetic fiber, both covering 0 to 100% RH. Three electronic instruments are fitted: a capacitive humidity sensor with a 0 to 10 V output, and wet and dry bulb thermocouples with a range of -100 to 400°C. The psychrometer principle in this dew point hygrometer is based on evaporation cooling, comparing ambient and wet bulb temperatures. The capacitive sensor detects changes in the dielectric constant of a layer caused by absorbed water molecules.
Software
ThermoFlux - 7089 Software (Optional)
- Developed in the National Instruments LabVIEW environment
- Designed specifically for data acquisition with this apparatus
- Records, stores, and calculates experimental results
- A set of electronic sensors is included when the software option is selected
- Compatible with any Windows operating system
Scope of Delivery
- 1 experimental unit
- 1 instructional material
Optional Accessories
| Item | Model | Measuring Range | Graduation |
|---|---|---|---|
| Whirling Psychrometer with Thermometer | ThermoFlux - 7089/01 | -5°C to 50°C | 1°C |
Standards & Compliance
- Manufactured under ISO 9001:2015 Quality Management System
- CE Marking - European Conformity where applicable
- Supplied with calibration certificate, operation manual, and experiment guide
- 12-month manufacturer's warranty (parts & labour from installation)
Ordering & Delivery
- Incoterms: CIF to destination seaport, FOB Mundra/Nhava Sheva, or Ex-Works Ambala
- Lead time: 3–5 weeks production + sea transit to destination
- Payment: LC (Letter of Credit) or T/T bank transfer against proforma invoice
- Documentation: commercial invoice, packing list, bill of lading, certificate of origin, insurance certificate
Frequently Asked Questions
Q1: How many humidity measurement methods does the Dew Point Hygrometer ThermoFlux - 7089 support?
The unit supports three methods: psychrometric, hygrometric, and capacitive. Four instruments cover these methods, and all can be compared simultaneously under the same chamber conditions.
Q2: How is the climatic chamber humidified and dehumidified?
Humidification is performed by an ultrasonic atomizer rated at 22 W, fitted with a low-water cut-off. Dehumidification is carried out by a Peltier cooling element with a 58 W cooling capacity at 50°C ambient temperature and a cooling surface of 1600 mm².
Q3: What is the measuring range of the capacitive humidity sensor?
The capacitive sensor measures 0 to 100% RH with an output voltage of 0 to 10 V and includes a digital display.
Q4: Is the DAQ software included as standard?
No. The ThermoFlux - 7089 software is optional. When selected, it includes the required electronic sensors and runs on any Windows operating system in a LabVIEW environment.
Q5: Is a psychrometer available as an accessory?
Yes. A Whirling Psychrometer with Thermometer (ThermoFlux - 7089/01) is available as an optional accessory, with a measuring range of -5 to 50°C and a graduation of 1°C.