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Built-in differential pressure sensor – enables Pitot tube and filter measurements without additional equipment
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Wireless flexibility – using Bluetooth® probes for hassle-free measurements up to 20 m away.
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Intuitive operation – with structured menus for volume flow, comfort level, and long-term monitoring.
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Versatile probe compatibility – with simultaneous support for Bluetooth, cable, and thermocouple probes
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USB data export – for easy reporting and analysis of up to 7500 stored measurements.
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Einfache, schnelle und präzise Messung von Lufttemperatur und relativer Luftfeuchte
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Berechnung von Taupunkt- und Feuchtkugeltemperatur
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Schnelle In-App-Konfiguration, Grafikverlauf, Second Screen und Messdatenspeicher in der testo Smart App
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Akustischer Alarm bei Grenzwertüberschreitung
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User Manaul
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- Measures temperature / moisture / dew point
- Calculates surface moisture content
- Easy to follow menu guide, memory of up to 200 readings, data analysis with free to download software
- 4-point laser and 50:1 optics for precise measurements, even over long distances
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In a compact case protected by a shockproof sheath, the Physics Line C.A. 847 materials humidity indicator checks the humidity content from 6 to 100% in construction materials like plaster, wood, etc.
- 2 display scales with 20 LEDs: 6 to 23 % / 24 to 100 %
- Integrated, replaceable electrodes (L = 12 mm)
- Battery charge indication
- Dimensions: 195 x 60.5 x 38 mm
- Weight: 160 g
- Shockproof sheath
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- A measuring instrument for all climate-related parameters
- Extendible with a wide range of probes
- Wireless measurement with Bluetooth probes
- USB interface for exporting measurement reports as CSV files
- Intuitive measurement menus
- Graphic display with parallel display of 3 readings
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Bedienungsanleitung
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- Percise dew point measurement down to -80°Ctd
- Quick response time
- 3.5" graphic display / easy operation via touch screen
- Integrated data logger for storage of the measured values
- USB interface for reading out via USB stick
- Calculates all necessary moisture parameters like g/m³, mg/m³, ppm V/V, g/kg, °Ctdatm
- International: Up to 8 languages selectable
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- Separate pressure measurement
- Dew point distance via external temperature sensor
- Compressed air consumption measurement
- Active power in kWh/kW
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- Precise dew point measurement down to -80°Ctd
- Robust case for field use
- Integrated pressure measurement up to 16 bar
- Integrated measuring chamber with integrated dry container protects the dew point sensor during transport and grants a quick adaptation time
- Long-time stable humidity sensor: precise, insensitive against dewing, quick adaptation time
- Optionally available: 2 further sensor inputs for external sensors
- Optionally available: Integrated data logger
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The testo 606-1 is a compact moisture meter that meaures the moisture content in wood, walls and other surfaces and materials and fits snugly in any pocket. Ideal not only for professionals, but also private users who appreciate the precision which such a professional tool has to offer.
- Precise moisture measurements in wood, cement, screed etc.
- Characteristic curves for different types of wood
- Hold function: freezes the last reading for convenient use
- Easy to use; backlit display for use in all lighting conditions
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The testo 606-2 moisture meter allows you to measure the moisture content in wood and building materials – and the surrounding environment too. This means that you are now also able to check storage and drying conditions quickly and easily.
- Ram electrodes guarantee precise moisture measurements in wood and building materials
- Ideal for carrying out relative humidity and air temperature measurements to check storage and drying
- Identifying and preventing problems using dew point and wet bulb calculations
- Easy to use; backlit display for use in all lighting conditions
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The handy testo 610 thermohygrometer asurement of temperature and humidity in indoor areas. In addition, the compact instrument can also calculate the dew point and the wet bulb temperature.
- Easy temperature and humidity measurement
- Calculation of dew point and wet bulb temperature
- Illuminated display
- Capacitive humidity sensor with long-term stability
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Datasheet
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The testo 616 professional moisture meter provides you with a precise and non-destructive means of measuring the moisture content of wood and other building materials.
- Measures the moisture content of wood and building materials quickly and reliably
- Non-destructive, precise measurements up to a material depth of 5 cm
- 10 characteristic curves for different types of building material and wood
- Backlit display, hold function, min/max memory, ergonomic design
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The testo 625 thermohygrometer comes into its own in all situations where the right indoor climate is crucial, for example in archives, storerooms, greeenhouses and buildings. The testo 625 also calculates the dew point and wet bulb temperature quickly and accurately.
- Measures air temperature and relative humidity
- Calculates dew point and wet bulb temperature
- Displays min and max values, hold function, power off mode
- Integrated longlife moisture meter for long lasting quality
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- Probes available as an option mean you can measure air humidity, temperature, absolute pressure and dew point in compressed air
- Two plug-in probes and 3 radio probes can be attached
- Calculates dew point and dew point distance
- Display of min., max. and mean values
The testo 635-1 temperature and humidity measuring instrument enables you to measure the temperature, air humidity and dew point – in compressed air as well. State-of-the-art technology and a large selection of probes, which are available as an option, enable this wide variety of measuring possibilities.
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- Optionally available sensors for moisture, temperature, pressure dew point and absolute pressure measurements
- 2 plug-in sensors and 3 wireless sensors can be connected
- Super-size memory for up to 10 000 readings
- USB cable and PC software for archiving and logging measuring data included
The testo 635-2 temperature and moisture meter allows you to carry out temperature and moisture measurements on a variety of different materials, surfaces and environments. This is made possible due to leading-edge technology and a wide selection of optionally available sensors.
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Humidity Meters – precise RH/T measurement for service, labs & buildings
Humidity meters measure relative humidity (RH), temperature and—depending on model—dew point, enthalpy, WB/DB (wet/dry bulb) or CO₂/VOC. Formats include handhelds with interchangeable probes, compact meters with integrated sensors and multi-channel systems with external probes and data-logging.
Key features (model-dependent): fast response, display/trend, min/max/avg, alarm thresholds, onboard memory & USB/Bluetooth, robust IP ratings, swappable sensor modules and optional factory/DAkkS calibration certificates.
ICS Schneider Messtechnik helps with instrument selection, measurement strategy, calibration, validation and data integration into BMS/SCADA/cloud.
FAQ on Humidity Meters
Answers on selection, accuracy, probes, methods, calibration, maintenance and best practices.
What are humidity meters used for?
For on-site checks in HVAC/cleanrooms, quality control in production/labs, building diagnostics, museums/archives and general service/validation.
Which form factors exist?
- Compact handhelds with integrated RH/T probe.
- Modular systems with interchangeable probes (RH/T, surface T, airflow, dew-point for compressed air, CO₂).
- Multi-channel meters incl. logger with external probes.
What accuracy is realistic?
Typically ±1…2 %RH and ±0.2…0.3 °C in standard ranges. Higher accuracy is possible with reference-calibrated probes and stable environments.
What do WB/DB, enthalpy and dew point mean?
DB = dry-bulb temperature, WB = wet-bulb; together with RH/T they allow calculation of enthalpy, absolute humidity and dew point—important for HVAC and drying.
Which probes are available?
Standard RH/T probes, miniature/fast response, high-temperature/heated cap, duct-rated probes, dew-point (dp) for compressed air and CO₂/VOC probes.
How should I measure in ducts?
Insert the probe perpendicular to airflow with sufficient insertion depth; observe straight-run requirements, avoid drafts/edge zones and allow stabilization time.
How do I minimize temperature effects?
Aim for isothermal conditions between probe and environment; avoid sun/radiation and touching the sensing head; minimize meter self-heating and consider a radiation shield if needed.
How fast do sensors respond?
Typical t63 is 5–15 s in air; filters/heated caps slow response, miniature probes are faster.
What logging & interface options exist?
Data loggers with 10⁴…10⁶ points, CSV/PDF export, USB/BLE, and often PC/App software with report generator and audit trail.
How do I choose the sampling interval?
Fast dynamics: 1–10 s; building climate: 30–300 s; long-term: 5–60 min. Shorter intervals increase data volume and power consumption.
How often should I calibrate?
As a rule of thumb annually; for QA-critical tasks semi-annually. Perform interim checks with salt solutions or a humidity generator.
Which calibration methods are suitable?
Saturated salt solutions (fixed points), climate chamber/humidity generator with a traceable reference, and laboratory chilled-mirror systems.
How do I care for and clean probes?
Remove dust with a soft brush/air, avoid aggressive solvents, clean/replace filter caps, and shorten intervals in chemically harsh environments.
How do I prevent/manage condensation?
Use heated caps, approach cold surfaces slowly, and after fogging allow dry-out time or run sensor regeneration if the device supports it.
Which IP ratings make sense?
At least IP40–IP54 indoors; choose IP65/67 for harsh/outdoor use. Transport in a protective case.
How do I document professionally?
Record as-found/as-left, test points, stability window, traceability, expanded uncertainty (k=2) and timestamps; export as PDF/CSV.
What common pitfalls should I avoid?
- Measuring in drafts or direct radiation.
- Insufficient stabilization time.
- Dirty/unsuitable filter caps.
- Temperature gradient between probe and medium.
Do you support selection & validation?
Yes—we recommend meters/probes, create measurement/calibration plans, provide factory/DAkkS certificates and integrate data with BMS/SCADA/cloud.