WIKA FAQ: Pressure Gauge Catalogue PDF, Portal Login, Calibration

I review products and technical documentation at WIKA before they reach customers—roughly 200 unique items a year. Over time, I've noticed that the questions people ask before buying are remarkably consistent. Some are about finding specs. Some are about portal access. And some are about instruments we don't even make.

Here are the ones I actually get asked, in order of frequency. I've kept every answer short because, honestly, you don't need a 3,000-word essay to learn where to find a PDF.

1. Where can I find the WIKA pressure gauge catalogue PDF?

On WIKA's website, in the Download Centre. As of January 2025, the full pressure gauge catalogue PDF is available there without a login. It covers the S-20 industrial gauges, the A-10 series, and the 213.53.63 models, with dimensions, materials, accuracy classes, and ordering codes. The PDF's internal search function saves me an embarrassing amount of time.

One tip: download the current version. Third-party sites host outdated WIKA PDFs that still list discontinued models and old part numbers. So glad I check the revision date before recommending a document. The current catalogue prints the date on the cover, and WIKA updates it roughly twice a year.

2. What is the WIKA portal login for?

The WIKA portal, accessed via wika.com, is for customers who need more than public specs. Once your account is approved, you can track orders, download calibration certificates, pull CAD models, and access product documentation.

Approval typically takes about 48 hours—a bit longer if the verification team has questions about your company details. I should add that you don't need the portal for basic product data. The public site covers that. The portal becomes useful once you're managing live projects and need certificates without emailing your contact person every time.

3. Pressure gauge or pressure transmitter: which do I need?

The selection question I get most. It took me about four years and a few hundred order reviews to understand that most mistakes aren't about instrument quality—they're about picking the right category in the first place.

A pressure gauge gives a local reading. Mechanical versions need no power at all. Accuracy is typically 1.0% or 1.6% of span, depending on model and standard (EN 837-1 or ASME B40.100). A pressure transmitter converts pressure to a 4-20 mA signal for remote monitoring. It needs a power supply and a control system to interpret the output.

Why does this matter? Because installing 20 transmitters on a skid with no PLC is thousands of dollars for signals nobody reads. I've watched it happen. The reverse occurs too: operators who need data in the control room get local gauges because nobody asked the basic question first. Pick the category first. Then worry about the vendor.

4. Can I test my pressure transmitter with a signal analyzer?

Partially, and knowing the edges of that answer separates a fast diagnosis from a frustrating afternoon. A signal analyzer can measure the 4-20 mA loop, which verifies the transmitter is powered and its electrical output is present. That's genuinely useful. But it won't apply a pressure input, so it can't validate the measurement itself. For that, you need a pressure source: a portable calibrator or a deadweight tester.

I'll set a boundary here. WIKA makes pressure calibrators, and I can talk about those all day. Signal analyzers are not our product line. When customers ask which one to buy, I recommend evaluating electrical test specialists. I'd rather say "that's outside our scope" than pretend we're the answer to everything. A vendor who names their limits is more credible for the things they do handle.

5. Is a $10 multimeter good enough for instrumentation work?

Depends entirely on the task. For continuity checks, battery voltage, and verifying a relay closure, a $10 meter is fine. That's roughly 80% of routine maintenance tasks.

But don't trust it for 4-20 mA loop verification. I compared a budget meter and a proper loop calibrator on the same transmitter signal once: the budget meter read 12.4 mA while the reference said 12.0 mA. That 0.4 mA difference is about 2.5% of span. In a level application, that's a phantom process change that doesn't exist.

When you're commissioning a transmitter, use a meter with 0.5% DC accuracy or better—or a dedicated loop calibrator. A reliable brand-name meter runs around $50, give or take, which isn't a big premium for readings you can trust. And whether you buy one unit or ten for your crew, the accuracy spec that matters stays the same.

6. How do I calibrate an Extech pH meter?

I get this one often enough to have a standard answer. Even though Extech isn't a WIKA product, the calibration principle transfers: use fresh buffer solutions. For most pH meters, calibrate with pH 7.00 buffer first, then either pH 4.00 or pH 10.01 depending on your expected measurement range. Most Extech models have a two-point auto-calibration routine in the menu. Temperature compensation matters—buffers are certified at 25°C.

Fresh buffer matters more than the meter's brand. Expired buffer can produce a "successful" calibration that's still off by 0.3 pH or more. Check the buffer expiry date first, always.

For exact button sequences, the Extech manual (free on the manufacturer's site) is the right reference. I look up model-specific procedures myself every time. I have mixed feelings about saying that—part of me wants to rattle off every step from memory. I don't. A manufacturer's manual is the authoritative source for its own device, and pretending otherwise is how errors creep in.

7. How often should I calibrate my WIKA pressure gauge?

A 12-month interval is a reasonable starting point. But the right interval for your gauge depends on usage rate, how much it's cycled, and what your quality system requires.

A mechanical gauge on a stable hydraulic line can hold its accuracy for years. The same model on a steam line that swings through 100°C every shift can drift out of tolerance in six months. I've seen both cases documented in the same facility.

Base the interval on calibration history, not a generic calendar. If your last calibration showed drift near the tolerance limit, shorten the interval. If it came back clean twice in a row, extend it. And check the lab's ISO/IEC 17025 scope to confirm it actually covers the measurement you're requesting.

I rejected roughly 7% of first-delivery instrument documentation in 2024 because certificates, labels, or spec details didn't match the order. The hardware was fine. The paperwork had to be corrected before shipping. That's the part of my job nobody sees. It protects everyone.

Some answers were about our products. A few weren't. That's intentional.