Product Core Brief
- Model: ZR22G-040-S-E-C-R-M-E-A
- Brand: YOKOGAWA
- Series: EXAxt
- Core Function: In-situ zirconia oxygen measurement for combustion exhaust gases.
- Product Type: Split-Type Zirconia Oxygen Probe
- Key Specs: 0.4m Length | DIN PN10 Flange | Ext. Reference Gas
- Condition: New Surplus / Original
Product Introduction
YOKOGAWA ZR22G-040-S-E-C-R-M-E-A is a split-type in-situ zirconia oxygen probe. This YOKOGAWA sensor installs directly into flues, eliminating extractive sampling lines and reducing maintenance overhead.
Engineered for harsh environments, the YOKOGAWA handles sample gas temperatures up to 700°C. It delivers a 5-second response time and supports HART digital communication for remote diagnostics.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | Split-Type Zirconia Oxygen Probe |
| Probe Length | 0.4m (-040) |
| Wetted Material | SUS316 (-S) |
| Flange Standard | DIN PN10-DN50-A SUS304 (-E) |
| Reference Gas | External Connection / Instrument Air (-C) |
| Gas Connection Thread | Rc1/4 (-R) |
| Connection Box Thread | M20X1.5mm (-M) |
| Manual Language | English (-E) |
| Base Model | -A (Standard) |
| Measurement Range | 0.01 – 100 vol% O2 |
Quality Control Process
We don’t just ship these probes blindly. Every YOKOGAWA undergoes a rigorous bench validation. We verify the internal heater element resistance matches factory specs using precision multimeters. Thermocouple output is checked against a calibrated reference to ensure accurate temperature compensation. We then perform a span gas calibration test using certified reference air to confirm linearity across the 0-25% range. Finally, HART communication is verified to ensure self-diagnostics and sensor resistance checks are fully functional. Units failing any test are quarantined.
Replacement Pitfall Guide
❗ Verify Insertion Length: The “-040” suffix means a 0.4m insertion length. Guessing the insertion depth will put the sensor in the wrong temperature zone or cause it to hit the opposite wall. Measure from the flange face to the centerline of the stack.
❗ Check Reference Gas Method: The “-C” suffix indicates external reference gas (instrument air). You must install a reference gas piping assembly to provide a stable flow. Using natural convection in a pressurized stack will cause immediate reading drift.
❗ Flange Mismatch Risks: The “-E” suffix specifies a DIN PN10-DN50-A flange. Do not attempt to mate this to an ANSI or JIS flange without an adapter. Bolt hole misalignment will cause process gas leaks and safety hazards.
❗ Thread Compatibility: The gas connection is Rc1/4 (-R) and the connection box is M20X1.5mm (-M). Verify your existing conduit fittings and gas tubing adapters match these exact thread standards before installation.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| Direct | Exact match; verify physical condition | ||
| ZR22S-040 | Needs Adaptation | ZR22S is the explosion-proof variant; verify hazardous area requirements | |
| ZR202G | Needs Adaptation | ZR202G is an integrated (一体型) unit; requires removing external converter | |
| ZR402G | Converter Only | ZR402G is the replacement converter/transmitter, not the probe |
- Measurement Drift: ±2% F.S./month (Zero and Span)
- Repeatability: ±0.5% F.S. (0-5 vol% O2 range)
Need help with the converter pairing? The ZR22G probe must be matched with the right ZR402G converter for your application.
