First, an overview 
 The input level meter pressure-sensitive core using high-performance silicon piezoresistive pressure oil-filled cores, internal ASIC sensor millivolt signal into a standard long-distance transmission of the current signal can be directly with the computer interface card, control instrument, intelligent instrument or PLC connected convenience. The series products are widely used in industrial process control, oil, chemical, metallurgical and other industries. 
 1.1 Features 
 ◆ the use of simple 
 ◆ Easy to install 
 1.2 The main purpose 
 ◆ the products are widely used in liquid level measurement for industrial process control, oil, chemical, metallurgical and other industries. 

 Second, the main technical parameters 
 The ⑴ Operating temperature: 0 ℃ ~ 100 ℃; 
 (2) Power supply: 24VDC 
 (3) 4-20mA the nonpolar connection. 
 ⑷ basic error 
 The level of accuracy of the transmitter is divided into: 
 0.1, the basic error of ± 0.1; 
 0.3, the basic error of ± 0.3; 
 0.5, the basic error of ± 0.5 (basic error of the percentage of the range). 
 ⑸ thermal zero drift 
 Deviate from the reference conditions of temperature in the ambient temperature, the zero drift of the transmitter should be less than 0.03% FS / ° C. 
 ⑹ thermal sensitivity drift 
 Deviate from the reference conditions of temperature in the ambient temperature, the full range of the transmitter drift should not be greater than 0.03% FS / ° C. 
 ⑺ insulation resistance 
 In the reference conditions, the transmitter terminal between the insulation resistance shall not be less than 
 20MΩ/250V. 
 ⑻ explosion-proof performance of the instrument proof performance requirements meet the Exia II CT4.