Saw passive wireless parameters
Short Description:
Using the principle of surface acoustic wave temperature measurement, the temperature information into electromagnetic wave frequency signal components. Temperature sensor is directly installed on the surface of the measured object temperature components, it is responsible for receiving the radio frequency signal, and return the radio signal with temperature information to the collector, when the temperature sensor works normally, it does not need external power supply such as battery, CT loop power supply. The signal field transmission between the temperature sensor and the temperature collector is realized by wireless electromagnetic waves.
Product Detail
Enviko WIM products
Product Tags
Collector transceiver antenna
The collector transceiver antenna transmits and receives the electromagnetic wave signal, completes the temperature acquisition.
Signal transmission of collector and temperature sensor. Used together with the temperature collector, Ann C is installed in the same compartment of the sensor, responsible for communication with the sensor antenna, complete the sending and receiving of excitation signal and sensor signal.
| Plat Panel Antenna 1(left) | Plat Panel antenna2(right) | |
| Frequency range | 422MHz--442MHz | 423MHz--443MHz |
| Center Frequency | 433MHz | 433MHz |
| Maximum gain | >3.5dBi | >2.8dBi |
| Resident bobby | <2.0 | <2.0 |
| Nominal impedance | 50Ω | 50Ω |
| Power range | 50 W | 50 w |
| Radiation direction | In all directions | In all directions |
| Appearance size | 208*178*50mm | 207*73*28mm |
| Temperature range | ~40C~+85C | ~40C~+85C |
| Joint mode | SMA external thread bore | SMA external thread bore |
| Connection feeder | RG-174 2m | RG-174 2m |
| Switch installation location | Outlet room and other space is relatively full grid area | Busbar room spec relatively narrow area |
Temperature Sensor
Temperature sensor according to the way of installation, models are divided into: Tuning fork sensor, bundled sensor, self-locking fastening sensor for different environments. According to the temperature range ans installation location, can be divided into ordinary type and high temperature type, corresponding to the detection of bus bar, moving contact temperature. The movable contact mounting type sensor is fixed on the plum blossom contact finger of the mobile contact of the hand cart cabinet.
Temperature sensor(movable contact mounting type)
Main parameters
| Sensor frequency | 12 frequencies, 424 to 441 MHz |
| Temperature range | 0C~180C |
| Measuring precision | Main 1C(0~120C); Earth 2C(120~180C) |
| Temperature resolution | 0.1C |
| Outline dimension | Minimum:28.1*16.5mm No 8 |
| Storage temperature | ~25C~190C, Note: high temperature storage affects life |
Size of sensor
Temperature Collector
The temperature collector produces the electromagnetic wave signal corresponding to the frequency of the temperature sensor. The electromagnet wave signal with temperature information returned by the temperature sensor is received and the temperature signal is analyzed and transmitted to the temperature measurement management device at the station end. The collector communicates with a group of sensors downlink and transmits RF pulse. The signal reflected by the sensors is processed in the well, and finally the effective temperature information is resolved.
Main parameters
| Number of antenna | 2 |
| Number of sensors | Max. 12 sensors per antenna, max. 24 sensors for 2 antennas |
| RF power | Max. 11dBm(10mW) |
| RF frequency | 424~441MHz |
| Communication interface | RS485 bus/Nbit wireless/WIFI wireless options |
| Communication protocol | MODBUS-RTU |
| Sampling frequency | Min 1s, configurable |
| Power supply | DC12V/0. 2A or DC5V/0.4A |
| Minimum size | 98*88*38mm |
| Installation mode | C45 rail clamping fixation |
Enviko has been specializing in Weigh-in-Motion Systems for over 10 years. Our WIM sensors and other products are widely recognized in the ITS industry.
