Description Description Zeal Wet and Dry Bulb Hygrometer – Mason’s Type, Country of Origin: England Zeal Wet and Dry Bulb Hygrometer / Psychrometer Mason’s Type by ZEAL England P501 C F PSYCHROMETER -20° to 50°C Wet & Dry Bulb Hygrometer Humidity Temperature Meter Tester Pinless Analog Moisture Measurer (50 mm). Mercury Base Zeal Hygrometer.
