WatchGas Fixed Flow Regulator Brass 0.5 LPM
Description
The WatchGas Fixed Flow Regulator 715 Brass delivers a consistent, factory-preset 0.5 LPM flow for bump testing and calibrating SST-series single-gas and multi-gas monitors. No flow adjustment needed — the regulator ships preset and flow-checked at the factory, so your bump-test passes are repeatable shift after shift. Brass construction suits routine non-reactive calibration gas service (CO, O2, LEL combustible mixes). Compatible with portable non-refillable cylinders; pairs directly with WatchGas SST1, SST4 Micro, SST4 Mini, and SST4 Pump monitors.
For reactive or corrosive gases (H2S above 25 ppm, SO2, HCN, Cl2), use the
Fixed Flow Regulator 715 Stainless Steel instead. If your workflow requires a pressure gauge to monitor remaining cylinder pressure, see the
Demand Flow Regulator with Pressure Gauge.
Part Number:
WG-A0195339 — Fixed Flow Regulator 715 (Brass), 0.5 LPM
Technical documents:
SST Accessories Brochure
Frequently Asked Questions
What is a fixed flow regulator, and when does it make sense over a demand flow regulator?
A fixed flow regulator delivers a continuous, preset gas flow — 0.5 LPM in this case — regardless of the instrument's sampling state. A demand flow regulator only opens when the instrument draws, reducing gas consumption. Fixed flow is simpler to operate and less sensitive to instrument inlet restrictions, making it the right choice for manual bump tests, field calibrations, and any situation where ease-of-use matters more than maximizing cylinder life.
Which WatchGas SST monitors is this regulator designed to work with?
This regulator is designed for the WatchGas SST product line:
SST4 Micro,
SST4 Mini,
SST4 Pump, and SST1 single-gas monitors. It's factory-flow-checked to deliver 0.5 LPM — within the range most WatchGas calibration cap and sensor-inlet assemblies are designed to accept for timed bump tests.
Why can't I use a brass regulator with H2S or SO2 calibration gas?
Reactive sulfur-bearing gases like H2S and SO2 react with brass alloys, causing corrosion inside the regulator body and — more critically — adsorbing onto the corroded metal surface. The gas concentration that reaches your monitor's sensor will be lower than what's printed on the cylinder label, leading to calibration errors that read low. For any reactive gas, use a stainless-steel or nickel-plated regulator to prevent this concentration loss. The
Fixed Flow Regulator 715 Stainless Steel is the correct choice for H2S, SO2, HCN, and similar reactive calibration mixes.
How often should I replace the regulator in a calibration program?
WatchGas recommends inspecting regulators at each cylinder change. Replace the regulator if the flow rate drifts from 0.5 LPM (detectable with a bubble flowmeter or by noticeably inconsistent calibration results), if the inlet or outlet fitting shows corrosion or thread damage, or if the flow orifice shows visible blockage. A regulator that delivers the wrong flow rate will cause incorrect calibration even if the gas cylinder concentration is certified. Call
800.829.9580.
Does OSHA specify a required flow rate for gas monitor calibration?
OSHA does not prescribe a universal calibration flow rate. The WatchGas manufacturer specifies 0.5 LPM as the design flow for SST-series calibration accessories. Following manufacturer specifications is the standard practice for compliance with OSHA 1910.146 (confined space) and OSHA 1910.132 (PPE requirements for gas detection). Using an incorrect flow rate — too high or too low — can cause the sensor to under-read or over-read during the calibration cycle, producing an invalid calibration certificate.
Read more
Description
The WatchGas Fixed Flow Regulator 715 Brass delivers a consistent, factory-preset 0.5 LPM flow for bump testing and calibrating SST-series single-gas and multi-gas monitors. No flow adjustment needed — the regulator ships preset and flow-checked at the factory, so your bump-test passes are repeatable shift after shift. Brass construction suits routine non-reactive calibration gas service (CO, O2, LEL combustible mixes). Compatible with portable non-refillable cylinders; pairs directly with WatchGas SST1, SST4 Micro, SST4 Mini, and SST4 Pump monitors.
For reactive or corrosive gases (H2S above 25 ppm, SO2, HCN, Cl2), use the Fixed Flow Regulator 715 Stainless Steel instead. If your workflow requires a pressure gauge to monitor remaining cylinder pressure, see the Demand Flow Regulator with Pressure Gauge.
Part Number:
WG-A0195339 — Fixed Flow Regulator 715 (Brass), 0.5 LPM
Technical documents:
SST Accessories Brochure
Frequently Asked Questions
What is a fixed flow regulator, and when does it make sense over a demand flow regulator?
A fixed flow regulator delivers a continuous, preset gas flow — 0.5 LPM in this case — regardless of the instrument's sampling state. A demand flow regulator only opens when the instrument draws, reducing gas consumption. Fixed flow is simpler to operate and less sensitive to instrument inlet restrictions, making it the right choice for manual bump tests, field calibrations, and any situation where ease-of-use matters more than maximizing cylinder life.
Which WatchGas SST monitors is this regulator designed to work with?
This regulator is designed for the WatchGas SST product line: SST4 Micro, SST4 Mini, SST4 Pump, and SST1 single-gas monitors. It's factory-flow-checked to deliver 0.5 LPM — within the range most WatchGas calibration cap and sensor-inlet assemblies are designed to accept for timed bump tests.
Why can't I use a brass regulator with H2S or SO2 calibration gas?
Reactive sulfur-bearing gases like H2S and SO2 react with brass alloys, causing corrosion inside the regulator body and — more critically — adsorbing onto the corroded metal surface. The gas concentration that reaches your monitor's sensor will be lower than what's printed on the cylinder label, leading to calibration errors that read low. For any reactive gas, use a stainless-steel or nickel-plated regulator to prevent this concentration loss. The Fixed Flow Regulator 715 Stainless Steel is the correct choice for H2S, SO2, HCN, and similar reactive calibration mixes.
How often should I replace the regulator in a calibration program?
WatchGas recommends inspecting regulators at each cylinder change. Replace the regulator if the flow rate drifts from 0.5 LPM (detectable with a bubble flowmeter or by noticeably inconsistent calibration results), if the inlet or outlet fitting shows corrosion or thread damage, or if the flow orifice shows visible blockage. A regulator that delivers the wrong flow rate will cause incorrect calibration even if the gas cylinder concentration is certified. Call 800.829.9580.
Does OSHA specify a required flow rate for gas monitor calibration?
OSHA does not prescribe a universal calibration flow rate. The WatchGas manufacturer specifies 0.5 LPM as the design flow for SST-series calibration accessories. Following manufacturer specifications is the standard practice for compliance with OSHA 1910.146 (confined space) and OSHA 1910.132 (PPE requirements for gas detection). Using an incorrect flow rate — too high or too low — can cause the sensor to under-read or over-read during the calibration cycle, producing an invalid calibration certificate.
The WatchGas Fixed Flow Regulator 715 Brass delivers a consistent, factory-preset 0.5 LPM flow for bump testing and calibrating SST-series single-gas and multi-gas monitors. No flow adjustment needed — the regulator ships preset and flow-checked at the factory, so your bump-test passes are repeatable shift after shift. Brass construction suits routine non-reactive calibration gas service (CO, O2, LEL combustible mixes). Compatible with portable non-refillable cylinders; pairs directly with WatchGas SST1, SST4 Micro, SST4 Mini, and SST4 Pump monitors.
For reactive or corrosive gases (H2S above 25 ppm, SO2, HCN, Cl2), use the Fixed Flow Regulator 715 Stainless Steel instead. If your workflow requires a pressure gauge to monitor remaining cylinder pressure, see the Demand Flow Regulator with Pressure Gauge.
Part Number:
WG-A0195339 — Fixed Flow Regulator 715 (Brass), 0.5 LPM
Technical documents:
SST Accessories Brochure
Frequently Asked Questions
What is a fixed flow regulator, and when does it make sense over a demand flow regulator?
A fixed flow regulator delivers a continuous, preset gas flow — 0.5 LPM in this case — regardless of the instrument's sampling state. A demand flow regulator only opens when the instrument draws, reducing gas consumption. Fixed flow is simpler to operate and less sensitive to instrument inlet restrictions, making it the right choice for manual bump tests, field calibrations, and any situation where ease-of-use matters more than maximizing cylinder life.
Which WatchGas SST monitors is this regulator designed to work with?
This regulator is designed for the WatchGas SST product line: SST4 Micro, SST4 Mini, SST4 Pump, and SST1 single-gas monitors. It's factory-flow-checked to deliver 0.5 LPM — within the range most WatchGas calibration cap and sensor-inlet assemblies are designed to accept for timed bump tests.
Why can't I use a brass regulator with H2S or SO2 calibration gas?
Reactive sulfur-bearing gases like H2S and SO2 react with brass alloys, causing corrosion inside the regulator body and — more critically — adsorbing onto the corroded metal surface. The gas concentration that reaches your monitor's sensor will be lower than what's printed on the cylinder label, leading to calibration errors that read low. For any reactive gas, use a stainless-steel or nickel-plated regulator to prevent this concentration loss. The Fixed Flow Regulator 715 Stainless Steel is the correct choice for H2S, SO2, HCN, and similar reactive calibration mixes.
How often should I replace the regulator in a calibration program?
WatchGas recommends inspecting regulators at each cylinder change. Replace the regulator if the flow rate drifts from 0.5 LPM (detectable with a bubble flowmeter or by noticeably inconsistent calibration results), if the inlet or outlet fitting shows corrosion or thread damage, or if the flow orifice shows visible blockage. A regulator that delivers the wrong flow rate will cause incorrect calibration even if the gas cylinder concentration is certified. Call 800.829.9580.
Does OSHA specify a required flow rate for gas monitor calibration?
OSHA does not prescribe a universal calibration flow rate. The WatchGas manufacturer specifies 0.5 LPM as the design flow for SST-series calibration accessories. Following manufacturer specifications is the standard practice for compliance with OSHA 1910.146 (confined space) and OSHA 1910.132 (PPE requirements for gas detection). Using an incorrect flow rate — too high or too low — can cause the sensor to under-read or over-read during the calibration cycle, producing an invalid calibration certificate.
Specifications
Specifications
-
MPN
-
Product Weight (lbs.)
-
Country of Origin
Reviews
Reviews
Keep your team protected & compliant!
- Expert guidance tailored to your specific needs
- Access responsive customer support when you need it
- Enjoy fast shipping directly to your location
- Benefit from extensive industry knowledge—75+ years of experience
- In-house gas detection calibration & repair services available
