ET2P wireless tank level transmitter with 2 input

I/O Discription:

(ETx-P can directly connect to prop to water resistance sensing and in ET3-P can directly connect to analoge sensor like ultrasonic distance sensor.)

                  ET2-x xxxP:   two prop input with water resistance sensivity/ active low / 5 uA current consumption /high level           3v , low level 0.5v

Power  Discription:

3 Internal NiCd rechargeable battery for energy storing, and a internal  modern automatic PWM charger so can charge batteries in a possible little time with many of battery parameters scanning. A solar cell input terminal for external power source for charging power consumption.

Power supply for sensors (DC/DC):

Maximum battery voltage is 4.5 v in full charge , so you cannot use a standard industrial range sensors with this low voltage . for solving this problem ET  has a DC/DC converter to prepare Radio modem power and sensors. It has 2 DC/DC so one for radio and one with 20V output 50mA for external ultrasonic distance sensor.

   Hi Industrial Protection case : IP66

Radio Discriptions:

ETx-P is equipped with ET-LM12 Low Power Data Radio Module, Features of ET-LM12 Low Power Data RF Module

1-low power transmission with the transmission power of 27dBm (500mW). (1W IS AVAILIBALE IN ORDER)

2-ISM frequency band, requiring on application of frequency point.
Carrier frequency of 433MHz, also capable of providing 450~470MHz carrier frequency.
3-High anti-interference and low BER(Bit error Rate) Based on the GFSK modulation mode, the high-efficiency forward error correction channel encoding technology is used to enhance data’s resistance to both burst interference and random interference and the actual bit error rate of 10^-5 ~ 10^-6 can be achieved when channel bit error rate is 10^-2.

4-Long transmission distance Within the range of visibility, the reliable transmission distance is >4500m (6000m FOR 1 W) when the height is greater than 2m (BER=10^-3@1200bps).