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Waterproof 14mm 40khz Ultrasonic Piezoelectric Transducer Double Use
Waterproof 14mm 40khz ultrasonic piezo transducer parking sensor double use sensor
Water proof type ultrasonic sensors were widely used for parking sensors, proximity sensors and level sensors, etc. With perfect seal these sensors can be used in a relatively poor environment such as dust and humidity.
Technical parameters | |
Part number | TM-1440H10TR |
Construction | Water proof type |
Using method | Dual use |
Center frequency | 40.0±1.0KHz |
Sound pressure level | 105dB min. |
Sensitivity | -82dB min. |
Capacitance | 1900Pf±20% |
Ringing | 1.2ms max. |
Maximum input voltage | 150Vp-p |
Directivity | 80°±15° (-6dB) |
Operating temperature | -30°C~+70°C |
Storage Temperature | -40°C~+80°C |
Specification
Specification Item | Parameter | Remark |
Resonant frequency | 40±1.0kHz |
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Echo Sensitivity | ≥150mV | Simulation test circuit see Figure 1. |
Decay Time | ≤1.05ms | |
Directivity (X) | 120±15° | Directivity test see Fig 2. |
Directivity (Y) | 60±10° | |
Electrostatic Capacitance | 1800±15%pF | 1kHz/25℃ |
Input voltage | ≤140Vp-p | 40kHz/ pulse width 0.5ms/ interval 20ms |
Mean Time to Failure | 50000h |
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Operating temperature | -35~+80℃ |
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Storage temperature | -35~+80℃ |
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Dimension
5.1 Sound pressure level and sensitivity shall not change by more
than 15dB in temperature range of -20°C to 60°C, at a relative
humidity of 30%.
5.2 Sound pressure level and sensitivity shall not change by more
than 6dB in the humidity of 10% to 90%, at the temperature of 25°.
5.3 MOISTURE
Keep the sensor at 40°C±2°C and 90°C to 95°C R.H for 96±4 hours.
Then, release the sensor into the room conditions for 24 hour prior
to the measurement. It shall fulfill the specifications in Table 1.
5.4 VIBRATION
Subject the sensor to the vibration for 1 hour each in the X.Y and
Z axes with the amplitude of 1.5mm at 10 to 55 Hz. It shall fulfill
the specifications in Table 1.
5.5 HIGH TEMPERATURE EXPOSURE
Subject the sensor to 80±5°C for 24±1 hours. then, release the
sensor into the room conditions
for 1 hour prior to the measurement. It shall meet the
specifications in Table 1.
5.6 LOW TEMPERATURE EXPOSURE
Subject the sensor to -30±5°C for 24±1 hours. Then release the
sensor into the room conditions
for 1 hour prior to the measurement. It shall meet the
specifications in Table 1.
ITEM | SPECIFICATION |
Center Frequency | Within ±0.5KHz |
Echo Voltage | Within ±20mv |
Ringing | Within ±0.2ms |
This sensor is designed for use in air. Do not use this sensor in
fluid.
In case where this sensor is to be hold in housing, use soft buffer
between sensor and housing. The front part of this sensor vibrates
in large.
If this part is hold, its characteristics will vary. The top must
be free to vibrate.
To prevent sensor malfunctions, operational failure or any
deterioration of its characteristics, do not use this sensor in the
following, or similar conditions.
A. In strong shock or vibration.
B. In high temperature and humidity for a long time.
C. In corrosive gases or sea breeze.
D. In an atmosphere of organic solvents.
E. In dirty and dusty environments that may contaminate the sensor
front.
