Newsletter
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1. Product brief introduction
Seal diaphragm is a pressure sensor component that used to prevent process medium directly into the differential pressure transmitter,they are connected with the transmitter through filled with fluid in the capillary. EJX118W, EJA118N and EJA118Y type diaphragm sealed differential pressure transmitter used to measure liquid, gas or steam flow and liquid level, density and pressure, and then transform it into 4 ~ 20 mA DC signal output. EJA pressure transmitter series support BRAIN, HART and FOUNDATION fieldbus PROFIBUS PA or communication protocol.
2.Technical Parameters
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Measurement Span |
Mdiaphragm capsule | Hdiaphragm capsule | ||
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-100~100kPa (-400~400inH2O) |
-500~500kPa (-2000~2000inH2O) |
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Measurement Range |
2.5~100kPa (10~400inH2O) |
25~500kPa (100~2000inH2O) |
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| Accuracy | ±0.2% | ±0.2% | ||
| Level of Protection | IP67，NEMA 4X，JIS C0920 The immersion type | |||
| explosion-proof | FM，CENELEC ATEX，CSA，TIIS，IECEx | |||
| Output Signal | 4~20mA DC or FOUNDATION™ fieldbus PROFIBUS PA two wire system of digital communication | |||
| Power |
BRAI and HART:10.5~42V DC (intrinsic safety type: 10.5~30V DC) Fieldbus:9~32V DC (intrinsic safety typeEntitym model9~24V DC，intrinsic safety typeFISCO model9~17.5V DC) |
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| Environment Temperature |
-40~60℃(-40~140℉) (Normal) -30~60℃(-22~140℉) (Built-in indicator in) The environment temperature must work in filling liquid temperature range. |
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| Process Temperature |
-50~300℃(-58~572℉) The environment temperature must work in filling liquid temperature range. |
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| Maximum Pressure | Flange pressure rated | |||
| Installation |
Transmitter: 2 - inch pipe installation Diaphragm seal: flange installation |
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| Size of Flanges |
Flat flange type: 3-inch(80mm)，2-inch(50mm) The convex flange type: 4-inch(100mm)，3-inch(80mm)
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| Diaphragm material | SUS316L，HastelloyC-276，Tantalum material, Titanium | |||
| The Flange material | S25C，SUS304，SUS316 | |||
| Shell | Aluminum alloy or SUS316 stainless steel (optional) | |||
3、Product selection table
Basic specification code：EJA118W-DMSJ1AA-AA01-92NN
EJA118W-- Diaphragm sealed differential pressure transmitter (Flush diaphragm type)
| Output Signal |
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| -G | Digital communication (PROFIBUS PA protocol) *10 | |||||||||||||||||||||
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Measurement span (capsule) |
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| [Diaphragm] [Others] | ||||||||||||||||||||||
| Wetted parts material *8 |
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| H# | Hastelloy C-276 *9Hastelloy C-276 *9 | |||||||||||||||||||||
| T | Tantalum Tantalum | |||||||||||||||||||||
| U | Titanium Titanium | |||||||||||||||||||||
| Process flange rating |
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Process flange size / material |
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Cover flange bolts material
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| [Process temp.] [Ambient temp.] | ||||||||||||||||||||||
| Fill fluid |
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| -C*3 | For high temperature use (silicone oil) 10 to 300 [1]C 10 to 60[1]C | |||||||||||||||||||||
| -D*4 | For oil-prohibited use (fluorinated oil) -20 to 120 [1]C -10 to 60 [1]C | |||||||||||||||||||||
| -E | For low temperature use (ethylene glycol) -50 to 100 [1]C -40 to 60 [1]C | |||||||||||||||||||||
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Capillary length (m)
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| Installation |
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| Electrical connection |
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| A | G1/2 female, two electrical connections and a SUS316 blind plug | |||||||||||||||||||||
| C | 1/2 NPT female, two electrical connections and a SUS316 blind plug | |||||||||||||||||||||
| D | M20 female, two electrical connections and a SUS316 blind plug | |||||||||||||||||||||
| Integral indicator |
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| Mounting bracket |
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| N | (None) | |||||||||||||||||||||
The‘☆’marks indicate the most typical selection for each specification.Example:EJA118W-DMSA1DA-AA02-92NA/
The ‘#’marks indicate the construction materials conform to NACE material recommendations per MR01-75. For the use of SUS316 ma terial, there may becertain limitations for pressure and temperature. Please refer to NACE standards for details.
*1：Refer to GS 01C22T01-00E for HART Protocol version.
*2：In case of Wetted parts material code T (Tantalum), the process temperature limit is -10 to 200 [1]C.
*3：Wetted parts material code T (Tantalum) cannot be applied.
*4：Even in case where Fill fluid code D (fluorinated oil) is selected, if degrease cleansing treatment or both degrease cleansing and dehydrating treatmentfor the wetted parts is required, specify Optional code K1 or K5.
*5: In case of Wetted parts material code H (Hastelloy C), T (Tantalum), and U (Titanium) or Fill fluid code C (for high tempera ture use), specify capillarylength from 1 to 5 m.
*6：Refer to GS 01C22T02-00E for Fieldbus communication.
*7：Not applicable for Output signal code F and G.
*8：Users must consider the characteristics of selected wetted parts material and the influence of process fluids. The use of inappr opriate materialscan result in the leakage of corrosive process fluids and cause injury to personnel and/or damage to plant facilities. It is also possible that thediaphragm itself can be damaged and that material from the broken diaphragm and the fill fluid can contaminate the user's proce ss fluids.Be very careful with highly corrosive process fluids such as hydrochloric acid, sulfuric acid, hydrogen sulfide, sodium hypochl orite,and high-temperature steam (150 °C [302° F] or above). Contact Yokogawa for detailed information of the wetted parts material.
*9： Hastelloy C-276 or ASTM N10276.
*10：Refer to GS 01C22T03-00E for PROFIBUS PA communication.
*11：JIS SUS316L or ASTM grade 316L.
*12：JIS SUS304 or ASTM grade 304. Forged version may be used.
*13：JIS SUS316 or ASTM grade 316. Forged version may be used.
EJA110A Differential pressure transmitter/EJA118W/EJA118Y/EJA118N Double flanges differential pressure transmitter/EJA120A micro differential pressure transmitter/ EJA130A High performance differential pressure transmitter/EJA210A/EJA220A Flange Mounted Differential Pressure Transmitter/ EJA310A Absolute Pressure Transmitter/ EJA430A Gauge Pressure Transmitter/ EJA438W and EJA438N Diaphragm Sealed Gauge Pressure Transmitters/ Model EJA440A High Pressure Transmitter/EJA510A and EJA530A Absolute and Gauge Pressure Transmitters/Model EJX110A Differential pressure transmitter/EJX118W Diaphragm Sealed Differential Pressure Transmitters/EJX210A Flange Mounted Differential Pressure Transmitter/EJX430A Gauge pressure transmitter/ EJX438A Diaphragm seal pressure transmitter/EJX910A Multivariable Pressure Transmitter
