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Yokogawa
Yokogawa instruments are ordered by model and suffix code, a string such as EJX110A followed by option characters that fix span, materials and approvals. Founded in 1915 and headquartered in Tokyo, Yokogawa makes field instruments, process analyzers and the CENTUM control system used in refineries, gas plants and power stations. Seven Star LLC is an independent supplier listing Yokogawa pressure transmitters, flowmeters, temperature transmitters, analyzers and CENTUM I/O modules for users in Oman and the GCC.
Read more about Yokogawa 
Brand profile
About Yokogawa
- Founded
- 1915
- Headquarters
- Tokyo, Japan
- Speciality
- Industrial automation and measurement instruments
- Listed with us
- 31 products in 10 categories
Yokogawa instruments are ordered by model and suffix code, a string such as EJX110A followed by option characters that fix span, materials and approvals. Founded in 1915 and headquartered in Tokyo, Yokogawa makes field instruments, process analyzers and the CENTUM control system used in refineries, gas plants and power stations.
Seven Star LLC is an independent supplier listing Yokogawa pressure transmitters, flowmeters, temperature transmitters, analyzers and CENTUM I/O modules for users in Oman and the GCC.
Yokogawa product families on this page
Pressure is covered by the DPharp transmitters: the EJX110A differential pressure transmitter, the EJX530A and EJA530E in-line gauge pressure transmitters and the EJX910A multivariable transmitter. The ADMAG AXW is the magnetic flowmeter line, and the YTA610 and YTA710 are temperature transmitters. Analyzers include the FLXA402 four-wire and FLXA21 two-wire liquid analyzers, the TDLS8000 tunable diode laser gas analyzer and spare parts for zirconia oxygen analyzers, such as the E7042UD cell assembly kit for the ZR22 detector. Control hardware includes CENTUM VP I/O modules like the ADV161 digital input module and the YS1700 programmable indicating controller.
Where Yokogawa instruments are used
EJA and EJX transmitters measure pressure, level and DP flow throughout oil and gas, chemical and power plants. Zirconia oxygen analyzers and the TDLS8000 are used for combustion control on boilers and fired heaters. FLXA analyzers monitor pH, conductivity and dissolved oxygen in water and process streams, and CENTUM modules are bought as replacements for running control systems.
Ordering Yokogawa parts: what we need
Send the model and suffix code and the serial number from the nameplate, and for CENTUM modules the style code as well. For transmitters without a code we need span, output protocol, wetted materials, process connection, housing and the approval required. For oxygen analyzer spare parts give the detector and converter models, for example ZR22G and ZR402G, and the part number.
Request a Quote for Yokogawa Products
Looking for Yokogawa parts not listed here, or pricing for a project? Send us the part numbers and quantities. Seven Star LLC sources genuine Yokogawa products for customers across Oman and the GCC and replies with a formal quotation.
- Genuine OEM products
- Supply across Oman & the GCC
- Formal quotation from our sales team
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Frequently Asked Questions
What is the model and suffix code on a Yokogawa nameplate?
It is the full ordering string of the instrument. The model, such as EJX110A or YTA710, comes first, and the suffix codes that follow select output signal, measuring span capsule, wetted materials, process connection, housing, electrical connection and display. Optional codes after a slash add approvals and accessories. Send the string complete, as in FLXA21-D-P-D-CH-D1-NN-A-N-LA-N-NN/U.
What is the difference between Yokogawa EJA-E and EJX-A transmitters?
Both are DPharp transmitters using the same resonant silicon sensor principle. The EJA-E series, which succeeded the earlier EJA-A models, is the standard line, and the EJX-A series is the higher performance line that also includes the EJX910A multivariable transmitter. Mounting dimensions are closely related, but confirm span, accuracy class and approvals from the manufacturer's specifications before substituting one for the other.
What do you need to supply spare parts for a Yokogawa zirconia oxygen analyzer?
The models of the detector and the converter, for example ZR22G with ZR402G or the integrated ZR202G, their suffix codes and the Yokogawa part number of the item required, such as E7042UD for the cell assembly kit or K9471DS for a cover assembly. Insertion length and the detector's operating temperature version also matter for probe-related parts.
Why do you ask for the style code of a CENTUM module?
Yokogawa marks hardware revisions of its control system modules with a style code, such as S1 or S2, next to the model and suffix code. A running CENTUM VP or CS system may need a particular style or a compatible later one. Send the model, suffix and style from the module label and we check compatibility in the manufacturer's documentation.
Is Seven Star LLC a distributor of Yokogawa?
No. Seven Star LLC is an independent supplier that sources Yokogawa instruments, analyzer parts and control system modules through commercial channels. We check the model and suffix code against the manufacturer's documentation, propose the manufacturer's successor when a model is obsolete, and provide the Yokogawa datasheet and the certificates the manufacturer issues with the order on request.