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Dieterich Standard Flow Meter: Sourcing Legacy Rosemount Annubar Sizers Probes
Quick Answer
Silver Automation Instruments is an independent flow meter supplier based in China. We source and supply replacement probes for legacy Dieterich Standard Annubar flow meters. We also help recover Rosemount Annubar sizers data when the original sizing sheet is missing. You do not need to replace the complete DP flow meter when the probe body is worn, bent, or corroded. Send us pipe size in DN, old probe tag, fluid, pressure in bar, temperature in °C, and flow range for a quote and delivery time.
Why Sourcing Legacy Probes Is Often the Real Bottleneck
Here is the thing. Most engineers skip the probe inspection until the flow reading becomes noisy. The DP transmitter often still sends a clean 4-20 mA HART signal. The mounting hardware may still pass a visual check. But the probe inside the pipe is a wear item.
In practice, we see three common problems on legacy Dieterich Standard Annubar and Rosemount Annubar installations. Sand in produced water erodes the probe surface. Wet steam causes pitting. High velocity gas creates vibration and fatigue cracking near the mounting flange. When the probe fails, the plant loses flow data. The control loop may go to manual. Production accounting becomes uncertain.
OEM replacement parts are not always fast. Some legacy sizes have long delivery times. We have seen lead times of eight to twelve weeks in the Middle East and Africa. That is a long time for a plant running at full capacity.
What We Supply for Legacy Annubar Installations
Silver Automation Instruments supplies aftermarket and compatible Annubar probe assemblies for many legacy model series. Common tags we see on customer sites include Rosemount 485 Annubar, Rosemount 585 Annubar, and older Dieterich Standard Diamond II flow elements. We also handle the small parts that stop a rebuild: compression fittings, packing glands, isolation valves, and mounting brackets.
Material options include 316L stainless steel, duplex stainless steel, and Hastelloy C276. Probe length is cut based on the inner pipe diameter. That is why we ask for DN and pipe schedule instead of only the line size. A DN200 Schedule 40 pipe and a DN200 Schedule 80 pipe need different probe lengths.
Process data matters. Tell us the fluid type, operating pressure in bar, temperature in °C, and typical flow range in kg/h or m³/h. If the original Rosemount Annubar sizers and sizing sheets are missing, send us the current flow range, pipe ID, and process data. Our engineers can rebuild the probe geometry and confirm the DP span for the existing transmitter.
Typical Applications We Support
We have supplied leg

We supplied a duplex stainless steel probe for produced water lines in Oman. The customer sent the failed probe photo and pipe diameter. The new probe shipped within three weeks and fit the existing process connection.
Compressed air flow in a chemical site in Brazil also needed a fast rebuild. The original Dieterich Standard probe was damaged during a shutdown. We matched the probe length and process connection. The site started up on schedule.
How to Order a Replacement Probe
So the cost question is simple. Replacing a probe costs much less than replacing the complete DP flow meter. Send us a simple list of data. Pipe size in DN, pipe schedule or wall thickness, old probe tag number if available, process fluid, pressure in bar, temperature in °C, and flow range. A photo of the nameplate helps. If you have the original sizing sheet, send that too.
We check the geometry and material compatibility. We quote the probe, fittings, and delivery time. Standard 316L probes often ship in two to four weeks. Custom Hastelloy C276 probes may take five to seven weeks depending on raw material supply.
For urgent shutdowns, tell us the required site date. We can check expedited options. Contact Silver Automation Instruments: Tel +86-25-68650347, WhatsApp +86-25-52155837, WeChat +86 15365082610.
FAQ
Can you supply probes for old Dieterich Standard Annubar flow meters?
Yes. We supply aftermarket probes and mounting hardware for many legacy Rosemount Annubar and Dieterich Standard models. Send the old tag number or a photo of the nameplate.
Are these original Rosemount parts?
We are an independent supplier. We provide compatible aftermarket parts. If your plant requires OEM parts, we can also check availability through our partner channels.
What information do you need for a quote?
Send pipe size in DN, pipe schedule, fluid, pressure in bar, temperature in °C, flow range, and old probe tag if available. A photo of the nameplate helps.
Do you support hazardous area installations?
Yes. We can supply probes for installations that require ATEX Zone 1 documentation and material certificates. Tell us the classification when you request the quote.
What is the delivery time?
Standard 316L probes often ship in two to four weeks. Custom alloys or special lengths may take five to seven weeks. We confirm the delivery time before order acceptance.

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