The CEM DT-857 is an advanced anemometer that utilizes "Hot Wire" technology, designed to provide ultra-accurate measurements of air velocity and airflow. Thanks to its extendable telescopic probe, the device is the ideal choice for inspecting HVAC ducts and small, hard-to-reach openings that traditional devices cannot access.
Key Features:
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Hot Wire Technology: Provides exceptional accuracy in measuring very low air velocities that fan-type devices cannot detect.
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Telescopic Probe: A slim, extendable probe that facilitates measurements inside ducts and high ventilation openings.
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Comprehensive Measurements: Simultaneously measures air velocity, air volume flow (CFM/CMM), and air temperature.
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Dual LCD Display: A large backlit screen allows clear reading of both air velocity and temperature.
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Smart Functions: Includes MAX/MIN recording, average calculation (AVG), and data hold.
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Multiple Measurement Units: Supports conversion between (m/s, km/h, ft/min, MPH, Knots).
Technical Specifications (Model DT-857):
| Air Velocity Range |
0.1 ~ 20.0 m/s |
| Airflow Range |
0 ~ 999,900 CFM / CMM |
| Temperature Range |
0.0 ~ 50.0 °C (32 ~ 122 °F) |
| Resolution |
0.01 m/s for air velocity | 0.1 °C for temperature |
| Sensor Type |
Glass thermistor and highly sensitive hot wire |
| Power Source |
9V battery or 5V USB cable |
Ideal Applications:
- Balancing and inspecting airflow in central air conditioning systems (HVAC).
- Measuring the efficiency of filters and fans in laboratories and research rooms.
- Testing air velocity in biosafety cabinets and industrial ventilation openings.
- Routine maintenance of heating and ventilation systems in large buildings.
