OVERVIEW
Designed to be mounted in the Gen-Sys rack, the OHG-4 can be used in conjunction with your OVG-4 or V-OVG to generate a wide range of vapor standards, suitable for calibration of sensors, especially gas sensors.
The OHG-4 is a versatile humidity generator that is used to produce a range of relative humidity concentrations from 1 to 90%rh (±1%). When used in the GEN-SYS, in combination with an OVG-4 and an OFC-1, it can generate a wide range of vapor standards, suitable for calibration of sensors, especially gas sensors. In the OHG, the airflow is controlled by a mass flow controller. A flow suitable for the application is set using the front panel WetAir Flow control, this controls the mass flow controller (MFC). Downstream of the MFC the airflow is split into two flow paths, the first of which bubbles through the water reservoir. Downstream of the reservoir the two flows are recombined. The ratio of the two needle valve settingscontrols the humidity of the output air.
OHG-4 Technical Specifications
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HUMIDITY, UPPER LIMIT: >90% RH
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HUMIDITY, LOWER LIMIT: 1% RH depending on inlet gas
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WET GAS OUTLET FLOW RANGE: 300–3000 ml/min (different flow ranges available upon request)
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GAS: Air/nitrogen
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INLET PRESSURE: 40 psi
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INLET FITTING: 1/4” Swagelok quick connect
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OUTLET CONNECTION: 1/8” Swagelok compression
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POWER SUPPLY: 24V
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CURRENT RATING: 0.5 A
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DIMENSIONS (OHG ONLY): 145w x 240d x 260h mm
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DIMENSIONS (GEN-SYS RACK INC. OHG): 620w x 530d x 360h mm
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MASS (GEN-SYS): 15–25 kg depending on configuration
Integration
Integrating Your OHG-4 with Calibration Gas Generators and Flow Controllers
Owlstone’s modular Gen-Sys system easily allows you to add the OFC-1 Flow Controller and the OVG-4 or the V-OVG Calibration Generator to your system setup.
