Psychrometer with Canopy Herter 4006

The Herter 4006 Psychrometer with Canopy is a professional instrument designed for precise, on‑site measurement of air humidity using the time‑tested wet‑ and dry‑bulb method. Its integrated radiation‑shielding canopy protects the thermometers from direct solar load and precipitation, delivering stable, repeatable readings in outdoor and greenhouse environments. Built for field reliability and effortless operation, this model is ideal for agronomy, environmental monitoring, education and HVAC verification where trusted humidity data in SI units is essential. Choose the Herter 4006 to equip your projects with robust performance, minimal maintenance and long service life.

Key Benefits and Applications

• Reliable outdoor accuracy — The protective canopy and ventilated design minimise solar and wind artefacts, supporting dependable humidity readings in open‑air stations, farms and research plots.
• Easy, mercury‑free operation — Dual liquid‑in‑glass thermometers are clear to read in degrees Celsius, with a simple wet‑bulb wick that is quick to moisten and replace.
• No power required — Works anywhere without batteries or charging, making it perfect for remote sites, educational labs and quick verification tasks.
• Versatile field use — Suitable for agriculture, horticulture, forestry, building diagnostics and ventilation checks, as well as training and demonstrations in meteorology.
• Consistent results over time — Durable materials and straightforward maintenance routines help maintain measurement integrity through seasons of use.

Featured technical specifications

• Measurement principle — Wet‑ and dry‑bulb psychrometry for determining relative humidity and related parameters through the temperature depression between bulbs.
• Thermometer configuration — Two liquid‑in‑glass stems with clear Celsius scales for direct temperature reading and quick comparison.
• Radiation‑shield canopy — Vented protective housing that shields bulbs from direct sun and precipitation to reduce radiative errors in outdoor measurements.
• Wick system — Replaceable, absorbent cotton wick on the wet bulb to ensure uniform evaporation and stable wet‑bulb temperature behaviour.
• Humidity determination — Relative humidity derived using psychrometric tables or calculations based on the wet‑bulb depression and ambient pressure assumptions.
• Materials and build — Weather‑resistant components designed for field handling and long‑term reliability in demanding environments.
• Units of measurement — Temperature displayed in degrees Celsius and humidity expressed in percent relative humidity according to the International System of Units.
• Maintenance — Routine cleaning of the canopy, periodic wick replacement and verification against reference temperatures to preserve accuracy.
• Portability — Lightweight, field‑ready design for quick deployment at fixed stations or mobile surveys.

Why this psychrometer is the perfect choice

When you need dependable humidity measurements without complexity, the Herter 4006 stands out for its balance of rugged construction, straightforward use and credible psychrometric results. Pairing reliable hardware with a protective canopy ensures data you can trust in real‑world conditions. Secure yours at Stratosens.com and benefit from expert service, fast fulfilment and a curated selection of precision instruments backed by the Stratosens.com commitment to quality.