Sealed diaphragms are used for prevention of medium in the pipelines directly entering pressure sensors assembly in the differential pressure transmitters, which are connected with transmitters with the help of capillary tubes filling fluid inside.
JCE118W, JCE118N and JCE118Y diaphragm sealed differential pressure transmitters are used for measuring flow rate, density and pressure of gas, liquid and steam , and then outputs  4~20mA DC power signal corresponding to measured differential pressure. 
Because they can communicate with Hart system, remote set and monitor can be set..
Standard Technical Specification
Measurement Scope

 
1. Output signal:4~20mA DC with 2 wire system of digital communication
2. Ambient Temperature:
   -40~85°C(-40~185oF)(general model)
   -30~80°C(-22~176oF)(with LCD gauge head)
Remark: Ambient temperature limit have to be within the range of work temperature of filled liquid, see sheet 1(referring to additional specification of explosion proof variaties)
3. Ambient Temperature influence: referring to Sheet 2-1, 2-2 and 2-3
4. Fluid Touching temperature: referring to sheet 1
5. Ambient Humidity: 5~100%RH@(when 40°C)
6. Working pressure: 2.7kPa abs(20mmHg abs)
               ~rated working pressure of flange
7. Static pressure influence: referring to Sheet 2-1, 2-2 and 2-3
8. Power Voltage Variation Influence:
       ±0.005%/V(21.6-32)V DC, 350Ω
9. Erection: Transmitter: 2-inch pipeline erection
10. Diaphragm Sealed Parts: flange erection

Diaphragm Sealed Part Material
Diaphragm and other fluid touching parts: referring to "model and specification code list"
Capillary Tube: JIS SUS 316
Protection Tube: JIS BUS 304
PVC Shied(PVC maximum usage temperature: 100°C)(212o F  )
Filling Liquid: Referring to Sheet 4
External Zero Adjustment: it can be adjusted continuousl
Resolution: 0.01% of range
Zero Adjustment: whatever negative migration value and positive migration value, it can be set within the measured range of kinds of capsules within upper and lower limit of the measurement scope.