VAC measuring instrument - testo 445

Product catalog summary

Overview: The testo 445 is a multifunctional service instrument tailored for ventilation and air conditioning systems. It supports two probe inputs for diverse measurements such as flow velocity, volume flow, indoor air quality, temperature, humidity, enthalpy, pressure, and CO levels.

Key Features:

Displays last measurement value, minimum, maximum, and mean values with a button press.
Stores measurement data for PC analysis or on-site documentation with a fast printer.
Calculates point and timed mean values and directly displays volume flow.
Automatically allocates duct cross-section area to up to 99 measurement sites.
Internal memory for 3,000 measurement values.
Simultaneous measurement of up to 6 parameters.

Technical Specifications:

Operating temperature: 0 to +50 °C; Storage temperature: -20 to +70 °C.
Display: 4-line LCD; Battery: 9V block battery with 45-hour life.
PC interface: RS232; Weight: 255 g; Material: ABS housing.
Dimensions: 215 x 68 x 47 mm; Warranty: 2 years.

Measurement Capabilities:

Humidity: Range -50 to 180°C; Accuracy varies by probe type.
Velocity: 0 to 100 m/s; Volume flow: 0 to 99999 m3/h.
Pressure: Various probes available with different accuracy levels.
CO2 and CO measurement: Specific probes with defined accuracy.

Accessories and Probes:

Various probes for different measurements, including vane, thermal, and pressure probes.
Transport and protection cases, printers, software, and calibration certificates available.
Additional accessories include extension cables, connection hoses, and calibration solutions.

Applications: Suitable for measuring air flow in ducts, outlets, and extraction systems, as well as assessing indoor air quality and environmental conditions in various settings.

Probe Specifications: The document also details technical specifications for probes used in measuring humidity, temperature, and dew point across different environments, including measuring ranges and accuracy.

Specifications:

Measuring Range: Probes cover a range from -200°C to +1100°C for temperature and 0 to +100% RH for humidity.
Accuracy: Varies by probe type, with humidity accuracy ranging from ±1% RH to ±2% RH and temperature accuracy from ±0.4°C to ±4°C depending on the range.

Probe Types and Applications:

Humidity Probes: Used for measuring equilibrium moisture and in exhaust ducts, with temperature capabilities up to +180°C.
Pressure Dewpoint Probes: Designed for compressed air systems, with specific models including certification for test points at -40°C tpd.
Surface and Immersion Probes: Include quick-action and super quick-action types for both liquids and gases, with high-temperature capabilities up to +1100°C.

Accessories:

Connection Cables: Required for all probes, with part numbers 0430 0143 or 0430 0145.
Covering Caps: Various caps available for humidity probes to protect against high velocities, corrosive substances, and mechanical loads.

Key Considerations:

Ensure compatibility of probes with specific applications and environmental conditions.
Use appropriate covering caps and connection cables to maintain probe integrity and measurement accuracy.

Catalog excerpts

conditioning systems Point and timed mean value calculation Direct display of the volume flow Automatic allocation of duct cross-section area to measurement site (max. 99 measurement sites) Internal measurement value store (3,000 measurement PC software for the analysis, archiving and documentation of the measurement values (option) Measurement of up to 6 measurement parameters This service instrument is s real multi-talent: the testo 445 has two probe inputs for the connection of a broad range of probes for measurements on ventilation/air conditioning systems. The instrument records flow velocity values in a duct, at a duct outlet or on extraction systems. In addition to this, the allrounder measures or calculates the parameters volume flow, Indoor Air Quality, temperature, relative humidity, dewpoint, absolute humidity, degree of humidity, enthalpy, pressure and CO. At the simple press of a button, the testo 445 displays the last measurment value measured as well as minimum, maximum and mean values. In addition to this, measurement data can be stored according to measurement site and analyzed on a PC, or documented on site with the Testo fast printer.

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Technical data testo 445, VAC measuring instrument, incl. battery and calibration protocol General technical data Battery life: 6-45 h (depending on probe) Mains conn, and batt. rech. in Instr. Calculated humidity parameters: td, g/m3, g/kg pressure- Calculated velocity values (density-compensated): 0 to 100 m/s; 0 to Humidity measurement: Measuring range -50 to 180°C; See Probes Accuracy of Type K, J: Additional error via operation temperature 0.2 This service instrument is s real multi-talent: the testo 445 has two probe inputs for the connection of a broad range of probes for measurements...

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Technical data / Accessories Sensor type Meas, range Accuracy ±1 digit Resolution Transport and Protection Part no.

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Additional accessories and spare parts Part no. Calibration Certificates

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Probe type Probe shaft/probe shaft tip Flow velocity probes testovent 415, volume flow funnel, 0 210 mm/210x210 mm, incl. case 0554 0415 testovent 410, volume flow funnel, 0 340 mm/330x330 mm, Incl. case

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