Testo 425 NTC, Thermal 20m/s Max Air Velocity Air Velocity, Temperature, Volume Air Flow Anemometer
- RS Stock No.:
- 5120317
- Mfr. Prt No.:
- 0560 4251
- Brand:
- Testo
Technical Reference
Legislation and Compliance
RoHS Status: Not Applicable
Statement of Conformity
This statement confirms that the product detailed below complies with the specifications currently published in the RS media and has been subject to the strict quality conditions imposed by RS Components’ internal management systems. Furthermore and where applicable, it confirms that all relevant semiconductor devices have been handled and packed under conditions that meet the administrative and technical requirements of ANSI/ESD S20.20 and EN61340-5-1 electrostatics control standards.
| RS stock number | 5120317 |
| Product description | Testo 425 NTC, Thermal 20m/s Max Air Velocity Air Velocity, Temperature, Volume Air Flow Anemometer |
| Manufacturer / Brand | Testo |
| Manufacturer part number | 0560 4251 |
The foregoing information relates to product sold on, or after, the date shown below.
RS COMPONENTS
| Date | Dec 27, 2024 |
RS Components Pte Ltd Robinson Road, P.O. Box 1582, Singapore 903132
Country of Origin: DE
Product Details
testo 425
From Testo, the 425 hot-wire anemometer designed for measuring air velocity, air temperature and volume flow. The pocket-sized meter provides instant, accurate spot readings at ventilation ducts, air grills and air outlets. Constructed from tough, impact resistant materials the robust hand-held meter is an ideal instrument for HVAC engineers, technicians and installers.
Compact in design, the handheld anemometer uses a combination of hot-wire and NTC thermistor technology to deliver rapid, accurate readings. The 425 anemometer records the flow speed, calculates the volumetric flow and measures the temperature. With a measuring range of 0 to + 20 m/s, the meter can even be used for low flow speeds. A fixed telescopic probe with small 7.5mm dia sensor head can be extended to a maximum length of 820mm for applications where measuring space is hard to reach or limited.
An easy to navigate keypad and soft control buttons make the Testo 425 handheld anemometer incredibly easy to use. With minimal effort the user can select the function to be measured, the mode you wish to record and the unit the data will be shown. With a large backlit LCD display, all collected data is clearly shown on the front screen, even in low light conditions. A handy auto-off feature also helps to conserve battery life.
SUPPLIED_WITH : alkaline battery and instructions
Features and Benefits
• Compact, robust ABS housing
• Accurate, rapid results
• Easy to control keys
• Precision air velocity and NTC thermistor sensors
• Measurement of flow velocity, volume flow and Temperature
• Compact 7.5mm diameter sensor sits on top of telescopic probe
• Multi-point and timed mean calculation of volume flow, flow speed and temperature reading
• Shows air flow results in 3/s
• Shows volume flow results in m³/h
• Shows temperature results in °C
• Hold button to freeze readings
• Auto-off function for battery conservation
• Easy to read Illuminated display
Applications
Hot-wire anemometers are the perfect instrument for engineers and technicians looking to carry out tests and surveys on ventilation, air conditioning equipment. They are used to measure airflow and temperature quickly and accurately. The information and data they provide are vital in a wide range of applications and environments. They are essential for reporting, forecasting, planning and most importantly health and safety. Some of the more common applications are
• Environmental testing
• Air conveyors
• Clean rooms
• Air balancing
• Fans /motors/ blowers
• Furnace velocity
• Paint spray booths
• HVAC system performance
FAQ
Q - Is there a recommended replacement battery?
A - Yes, the Testo 425 digital anemometer uses a 9V battery for its power supply. See RS part number 826-4435
Specifications
| Attribute | Value |
| Brand | Testo |
| Power Source | Battery |
| Width | 64 mm |
| Length | 182 mm |
| Best Air Velocity Accuracy | ±5% + 0.03 m/s |
| Maximum Air Velocity | 20 m/s |
| Best Temperature Measurement Accuracy | ±0.7 °C |
| Minimum Operating Temperature | -20 °C |
| Height | 40 mm |
| Air Velocity Resolution | 0.01 m/s |
| Battery Life | 20 h |
| Weight | 285 g |
| Temperature Measurement Resolution | 0.1 °C |
| Model Number p | 425 |
| Probe Type | NTC, Thermal |
| Battery Type | 9V |
| Measurement Parameters | Air Velocity, Temperature, Volume Air Flow |
| Maximum Operating Temperature | +50 °C |