● Product Instruction
LF-0020 water temperature sensor (transmitter) uses high-precision thermistor as the sensing component, which has the characteristics of high measurement accuracy and good stability. The signal transmitter adopts advanced circuit integrated module, which can convert the temperature into the corresponding voltage or current signal according to different needs of users. The instrument is small in size, easy to install and portable, and has reliable performance; it adopts proprietary lines, good linearity, strong load capacity, long transmission distance, and strong anti-interference ability. It can be widely used for temperature measurement in the fields of meteorology, environment, laboratory, industry and agriculture.
● Technique Parameter
| Measurement range | -50～100℃ |
| -20～50℃ | |
| Accuracy | ±0.5℃ |
| Power supply | DC 2.5V |
| DC 5V | |
| DC 12V | |
| DC 24V | |
| Other | |
| Out-put | Current: 4～20mA |
| Voltage: 0～2.5V | |
| Voltage: 0～5V | |
| RS232 | |
| RS485 | |
| TTL Level: (frequency; Pulse width) | |
| Other | |
| Line length | Standard: 10 meters |
| Other | |
| Load capacity | Current output impedance≤300Ω |
| Voltage output impedance≥1KΩ | |
| Operating environment | Temperature: -50℃～80℃ |
| Humidity: ≤100%RH | |
| Produce weight | Probe 145 g, with collector 550 g |
| Power dissipation | 0.5 mW |
● Calculation Formula
Voltage type(0～5V):
T=V / 5 × 70 -20
(T is the measured temperature value (℃), V is the output voltage (V), this formula corresponds to the measurement range -20 ~ 50 ℃)
T=V / 5 × 150 -50
(T is the measured temperature value (℃), V is the output voltage (V), this formula corresponds to the measurement range -50 ~ 100 ℃)
Current type(4～20mA)
T=(I-4)/ 16 × 70 -20
(T is the measurement temperature value (℃), I is the output current (mA), this type corresponds to the measurement range -20 ~ 50 ℃)
T=(I-4)/ 16 × 150 -50
(T is the measured temperature value (℃), I is the output current (mA), this formula corresponds to the measurement range -50 ~ 100 ℃)
Note: The calculation formulas corresponding to different signal outputs and different measurement ranges need to be recalculated!
Post time: Mar-01-2022
