WatchGas Fixed Flow Regulator Stainless Steel 0.5 LPM
Description
The WatchGas Fixed Flow Regulator 715 Stainless Steel is purpose-built for calibration programs that include reactive and corrosive gas mixes — H2S, SO2, HCN, Cl2, and similar compounds that attack brass components. Stainless-steel construction resists corrosion and prevents gas adsorption onto the regulator body, so the concentration that reaches your monitor's sensor matches what's printed on the cylinder label. Factory-preset and flow-checked at 0.5 LPM, it delivers the consistent flow WatchGas SST-series instruments require for valid calibrations without operator adjustment.
For non-reactive calibration gases (CO, O2, LEL combustible mixes) on a budget, the
Fixed Flow Regulator 715 Brass covers routine service. If your workflow demands pressure monitoring or variable flow for demand-draw instruments, see the
Demand Flow Regulator with Pressure Gauge.
Part Number:
WG-A0299024 — Fixed Flow Regulator 715 (Stainless Steel), 0.5 LPM
Technical documents:
SST Accessories Brochure
Frequently Asked Questions
Why does stainless steel matter when calibrating H2S monitors?
Hydrogen sulfide reacts with the zinc and copper in brass alloys, forming metal sulfides on internal regulator surfaces. This creates two problems: corrosion that shortens regulator life and — more critically — adsorption of H2S molecules onto corroded metal, lowering the actual concentration delivered to your monitor. If your calibration gas cylinder is certified at 25 ppm H2S but a corroded brass regulator adsorbs 2–5 ppm in transit, your monitor calibrates to a lower target than intended. Stainless-steel construction eliminates this concentration error, keeping calibrations within OSHA's action levels and your permit thresholds.
Which reactive gases require a stainless-steel regulator?
Use stainless steel for any calibration gas that reacts with copper-zinc alloys: H2S, SO2, HCN, Cl2, NH3 at high concentrations, and PH3. For standard 4-gas mixes that include H2S as a component, use the stainless-steel regulator even if the other three gases would be fine through brass — the H2S fraction governs the regulator material choice. Call PK Safety at
800.829.9580 if you're unsure which regulator your calibration mix requires.
Is this regulator compatible with WatchGas SST1 single-gas monitors calibrated for H2S?
Yes. The 0.5 LPM fixed flow rate is designed for the WatchGas SST1 calibration cap and inlet assembly used across the SST1 line — including
SST4 Pump,
SST4 Mini, and
SST4 Micro. For SST1 H2S monitors (SST1-H, SST1-H-24, SST1-H-36), this is the correct regulator when using H2S-containing calibration cylinders.
How do I know when the regulator needs replacement?
Inspect the regulator at each cylinder change. Replace it when: the flow rate has drifted from 0.5 LPM (confirmed with a bubble flowmeter), the outlet fitting shows corrosion or thread damage, or the calibration process consistently produces out-of-tolerance results even with a freshly certified cylinder. Stainless-steel construction extends service life compared to brass in reactive-gas service, but the flow orifice can still foul with contamination over time. Proactive replacement every 12–18 months in heavy H2S service is a reasonable fleet management default.
Can PK Safety help with calibration gas cylinders to pair with this regulator?
Yes — PK Safety stocks WatchGas-compatible calibration gas cylinders, including 4-gas mixes (LEL/O2/CO/H2S) and single-gas cylinders for H2S, SO2, and other SST1 exotic sensor gases. Call
800.829.9580 or visit the
WatchGas Calibration Service page if you'd rather ship your monitors for professional in-house calibration.
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Description
The WatchGas Fixed Flow Regulator 715 Stainless Steel is purpose-built for calibration programs that include reactive and corrosive gas mixes — H2S, SO2, HCN, Cl2, and similar compounds that attack brass components. Stainless-steel construction resists corrosion and prevents gas adsorption onto the regulator body, so the concentration that reaches your monitor's sensor matches what's printed on the cylinder label. Factory-preset and flow-checked at 0.5 LPM, it delivers the consistent flow WatchGas SST-series instruments require for valid calibrations without operator adjustment.
For non-reactive calibration gases (CO, O2, LEL combustible mixes) on a budget, the Fixed Flow Regulator 715 Brass covers routine service. If your workflow demands pressure monitoring or variable flow for demand-draw instruments, see the Demand Flow Regulator with Pressure Gauge.
Part Number:
WG-A0299024 — Fixed Flow Regulator 715 (Stainless Steel), 0.5 LPM
Technical documents:
SST Accessories Brochure
Frequently Asked Questions
Why does stainless steel matter when calibrating H2S monitors?
Hydrogen sulfide reacts with the zinc and copper in brass alloys, forming metal sulfides on internal regulator surfaces. This creates two problems: corrosion that shortens regulator life and — more critically — adsorption of H2S molecules onto corroded metal, lowering the actual concentration delivered to your monitor. If your calibration gas cylinder is certified at 25 ppm H2S but a corroded brass regulator adsorbs 2–5 ppm in transit, your monitor calibrates to a lower target than intended. Stainless-steel construction eliminates this concentration error, keeping calibrations within OSHA's action levels and your permit thresholds.
Which reactive gases require a stainless-steel regulator?
Use stainless steel for any calibration gas that reacts with copper-zinc alloys: H2S, SO2, HCN, Cl2, NH3 at high concentrations, and PH3. For standard 4-gas mixes that include H2S as a component, use the stainless-steel regulator even if the other three gases would be fine through brass — the H2S fraction governs the regulator material choice. Call PK Safety at 800.829.9580 if you're unsure which regulator your calibration mix requires.
Is this regulator compatible with WatchGas SST1 single-gas monitors calibrated for H2S?
Yes. The 0.5 LPM fixed flow rate is designed for the WatchGas SST1 calibration cap and inlet assembly used across the SST1 line — including SST4 Pump, SST4 Mini, and SST4 Micro. For SST1 H2S monitors (SST1-H, SST1-H-24, SST1-H-36), this is the correct regulator when using H2S-containing calibration cylinders.
How do I know when the regulator needs replacement?
Inspect the regulator at each cylinder change. Replace it when: the flow rate has drifted from 0.5 LPM (confirmed with a bubble flowmeter), the outlet fitting shows corrosion or thread damage, or the calibration process consistently produces out-of-tolerance results even with a freshly certified cylinder. Stainless-steel construction extends service life compared to brass in reactive-gas service, but the flow orifice can still foul with contamination over time. Proactive replacement every 12–18 months in heavy H2S service is a reasonable fleet management default.
Can PK Safety help with calibration gas cylinders to pair with this regulator?
Yes — PK Safety stocks WatchGas-compatible calibration gas cylinders, including 4-gas mixes (LEL/O2/CO/H2S) and single-gas cylinders for H2S, SO2, and other SST1 exotic sensor gases. Call 800.829.9580 or visit the WatchGas Calibration Service page if you'd rather ship your monitors for professional in-house calibration.
The WatchGas Fixed Flow Regulator 715 Stainless Steel is purpose-built for calibration programs that include reactive and corrosive gas mixes — H2S, SO2, HCN, Cl2, and similar compounds that attack brass components. Stainless-steel construction resists corrosion and prevents gas adsorption onto the regulator body, so the concentration that reaches your monitor's sensor matches what's printed on the cylinder label. Factory-preset and flow-checked at 0.5 LPM, it delivers the consistent flow WatchGas SST-series instruments require for valid calibrations without operator adjustment.
For non-reactive calibration gases (CO, O2, LEL combustible mixes) on a budget, the Fixed Flow Regulator 715 Brass covers routine service. If your workflow demands pressure monitoring or variable flow for demand-draw instruments, see the Demand Flow Regulator with Pressure Gauge.
Part Number:
WG-A0299024 — Fixed Flow Regulator 715 (Stainless Steel), 0.5 LPM
Technical documents:
SST Accessories Brochure
Frequently Asked Questions
Why does stainless steel matter when calibrating H2S monitors?
Hydrogen sulfide reacts with the zinc and copper in brass alloys, forming metal sulfides on internal regulator surfaces. This creates two problems: corrosion that shortens regulator life and — more critically — adsorption of H2S molecules onto corroded metal, lowering the actual concentration delivered to your monitor. If your calibration gas cylinder is certified at 25 ppm H2S but a corroded brass regulator adsorbs 2–5 ppm in transit, your monitor calibrates to a lower target than intended. Stainless-steel construction eliminates this concentration error, keeping calibrations within OSHA's action levels and your permit thresholds.
Which reactive gases require a stainless-steel regulator?
Use stainless steel for any calibration gas that reacts with copper-zinc alloys: H2S, SO2, HCN, Cl2, NH3 at high concentrations, and PH3. For standard 4-gas mixes that include H2S as a component, use the stainless-steel regulator even if the other three gases would be fine through brass — the H2S fraction governs the regulator material choice. Call PK Safety at 800.829.9580 if you're unsure which regulator your calibration mix requires.
Is this regulator compatible with WatchGas SST1 single-gas monitors calibrated for H2S?
Yes. The 0.5 LPM fixed flow rate is designed for the WatchGas SST1 calibration cap and inlet assembly used across the SST1 line — including SST4 Pump, SST4 Mini, and SST4 Micro. For SST1 H2S monitors (SST1-H, SST1-H-24, SST1-H-36), this is the correct regulator when using H2S-containing calibration cylinders.
How do I know when the regulator needs replacement?
Inspect the regulator at each cylinder change. Replace it when: the flow rate has drifted from 0.5 LPM (confirmed with a bubble flowmeter), the outlet fitting shows corrosion or thread damage, or the calibration process consistently produces out-of-tolerance results even with a freshly certified cylinder. Stainless-steel construction extends service life compared to brass in reactive-gas service, but the flow orifice can still foul with contamination over time. Proactive replacement every 12–18 months in heavy H2S service is a reasonable fleet management default.
Can PK Safety help with calibration gas cylinders to pair with this regulator?
Yes — PK Safety stocks WatchGas-compatible calibration gas cylinders, including 4-gas mixes (LEL/O2/CO/H2S) and single-gas cylinders for H2S, SO2, and other SST1 exotic sensor gases. Call 800.829.9580 or visit the WatchGas Calibration Service page if you'd rather ship your monitors for professional in-house calibration.
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Product Weight (lbs.)
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