WatchGas Demand Flow Regulator w/Pressure Gauge 0-3LPM
Description
The WatchGas Demand Flow Regulator with Pressure Gauge delivers precise on-demand gas delivery for calibrating SST-series monitors in the field. Its vacuum-activated design flows gas only when the instrument draws — eliminating waste and ensuring consistent flow volume through the 0–3 LPM range. The integrated pressure gauge lets you read remaining cylinder pressure without a separate gauge, so you know when to swap cylinders before your next confined-space entry. Brass construction handles non-reactive calibration gases (CO, O2, LEL combustible mixes) reliably in demanding service.
Pair with the
WatchGas Demand Flow Regulator w/Pressure Sensor Valve if your calibration workflow uses an automated docking station that reads cylinder pressure electronically. For a simpler bump-test workflow at fixed 0.5 LPM, see the
Fixed Flow Regulator 715 Brass.
Part Number:
WG-A0177744 — Demand Flow Regulator 2004 0–3 LPM (Brass)
Technical documents:
SST Accessories Brochure
Frequently Asked Questions
What is a demand flow regulator and why does it reduce calibration gas consumption?
A demand flow regulator — also called a vacuum-activated regulator — only opens its valve when the connected gas detector creates a draw (negative pressure) on the inlet. Gas flows only while the instrument is actively sampling, then shuts off. Fixed-flow regulators, by contrast, flow continuously whether or not the instrument is drawing. For calibrations lasting 60–90 seconds, demand flow can reduce cylinder consumption by 40–60% compared to fixed-flow delivery of the same gas mix.
Which calibration gases is this regulator compatible with?
The WG-A0177744 brass-body regulator is designed for non-reactive calibration gas mixtures: CO in nitrogen, O2 in nitrogen, 4-gas mixes (LEL/O2/CO/H2S), and similar mixtures packaged in portable non-refillable cylinders. For reactive or corrosive gases — H2S concentrations above approximately 25 ppm, SO2, Cl2, or HCN — use a stainless-steel or nickel-plated regulator body to prevent corrosion and concentration loss.
What does OSHA require for portable gas monitor calibration, and how does this regulator help?
OSHA does not mandate a universal calibration interval by name, but OSHA 29 CFR 1910.146 Appendix C recommends calibrating portable gas monitors before each use in permit-required confined space entries. NIOSH and most monitor manufacturers echo this guidance. The demand-flow delivery of this regulator ensures gas reaches the sensor at the concentration listed on the cylinder label — consistent with the accuracy required to confirm your monitor reads within OSHA's action levels and permit thresholds.
How do I read the pressure gauge to know when to replace the cylinder?
Most portable non-refillable cylinders (34 L and 58 L) arrive at 500–750 psi. As gas is consumed, pressure drops proportionally. When the gauge reads below approximately 100–150 psi, the regulator may not maintain consistent delivery pressure and concentration accuracy can drift. Replace the cylinder before reaching that threshold to keep your calibration records defensible. Call PK Safety at
800.829.9580 if you need replacement calibration gas cylinders for your WatchGas SST monitors.
Is this regulator compatible with the WatchGas SST-DOCK docking station?
The SST-DOCK automated docking station has its own integrated gas delivery connection designed for the WatchGas demand-flow system. If you're running a fully automated bump-test and calibration workflow through the SST-DOCK, verify your docking station's gas inlet fitting against this regulator's outlet before ordering. For manual calibrations — connecting directly to the instrument's calibration port — this demand-flow regulator with pressure gauge is the standard choice. Questions? Call
800.829.9580.
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Description
The WatchGas Demand Flow Regulator with Pressure Gauge delivers precise on-demand gas delivery for calibrating SST-series monitors in the field. Its vacuum-activated design flows gas only when the instrument draws — eliminating waste and ensuring consistent flow volume through the 0–3 LPM range. The integrated pressure gauge lets you read remaining cylinder pressure without a separate gauge, so you know when to swap cylinders before your next confined-space entry. Brass construction handles non-reactive calibration gases (CO, O2, LEL combustible mixes) reliably in demanding service.
Pair with the WatchGas Demand Flow Regulator w/Pressure Sensor Valve if your calibration workflow uses an automated docking station that reads cylinder pressure electronically. For a simpler bump-test workflow at fixed 0.5 LPM, see the Fixed Flow Regulator 715 Brass.
Part Number:
WG-A0177744 — Demand Flow Regulator 2004 0–3 LPM (Brass)
Technical documents:
SST Accessories Brochure
Frequently Asked Questions
What is a demand flow regulator and why does it reduce calibration gas consumption?
A demand flow regulator — also called a vacuum-activated regulator — only opens its valve when the connected gas detector creates a draw (negative pressure) on the inlet. Gas flows only while the instrument is actively sampling, then shuts off. Fixed-flow regulators, by contrast, flow continuously whether or not the instrument is drawing. For calibrations lasting 60–90 seconds, demand flow can reduce cylinder consumption by 40–60% compared to fixed-flow delivery of the same gas mix.
Which calibration gases is this regulator compatible with?
The WG-A0177744 brass-body regulator is designed for non-reactive calibration gas mixtures: CO in nitrogen, O2 in nitrogen, 4-gas mixes (LEL/O2/CO/H2S), and similar mixtures packaged in portable non-refillable cylinders. For reactive or corrosive gases — H2S concentrations above approximately 25 ppm, SO2, Cl2, or HCN — use a stainless-steel or nickel-plated regulator body to prevent corrosion and concentration loss.
What does OSHA require for portable gas monitor calibration, and how does this regulator help?
OSHA does not mandate a universal calibration interval by name, but OSHA 29 CFR 1910.146 Appendix C recommends calibrating portable gas monitors before each use in permit-required confined space entries. NIOSH and most monitor manufacturers echo this guidance. The demand-flow delivery of this regulator ensures gas reaches the sensor at the concentration listed on the cylinder label — consistent with the accuracy required to confirm your monitor reads within OSHA's action levels and permit thresholds.
How do I read the pressure gauge to know when to replace the cylinder?
Most portable non-refillable cylinders (34 L and 58 L) arrive at 500–750 psi. As gas is consumed, pressure drops proportionally. When the gauge reads below approximately 100–150 psi, the regulator may not maintain consistent delivery pressure and concentration accuracy can drift. Replace the cylinder before reaching that threshold to keep your calibration records defensible. Call PK Safety at 800.829.9580 if you need replacement calibration gas cylinders for your WatchGas SST monitors.
Is this regulator compatible with the WatchGas SST-DOCK docking station?
The SST-DOCK automated docking station has its own integrated gas delivery connection designed for the WatchGas demand-flow system. If you're running a fully automated bump-test and calibration workflow through the SST-DOCK, verify your docking station's gas inlet fitting against this regulator's outlet before ordering. For manual calibrations — connecting directly to the instrument's calibration port — this demand-flow regulator with pressure gauge is the standard choice. Questions? Call 800.829.9580.
The WatchGas Demand Flow Regulator with Pressure Gauge delivers precise on-demand gas delivery for calibrating SST-series monitors in the field. Its vacuum-activated design flows gas only when the instrument draws — eliminating waste and ensuring consistent flow volume through the 0–3 LPM range. The integrated pressure gauge lets you read remaining cylinder pressure without a separate gauge, so you know when to swap cylinders before your next confined-space entry. Brass construction handles non-reactive calibration gases (CO, O2, LEL combustible mixes) reliably in demanding service.
Pair with the WatchGas Demand Flow Regulator w/Pressure Sensor Valve if your calibration workflow uses an automated docking station that reads cylinder pressure electronically. For a simpler bump-test workflow at fixed 0.5 LPM, see the Fixed Flow Regulator 715 Brass.
Part Number:
WG-A0177744 — Demand Flow Regulator 2004 0–3 LPM (Brass)
Technical documents:
SST Accessories Brochure
Frequently Asked Questions
What is a demand flow regulator and why does it reduce calibration gas consumption?
A demand flow regulator — also called a vacuum-activated regulator — only opens its valve when the connected gas detector creates a draw (negative pressure) on the inlet. Gas flows only while the instrument is actively sampling, then shuts off. Fixed-flow regulators, by contrast, flow continuously whether or not the instrument is drawing. For calibrations lasting 60–90 seconds, demand flow can reduce cylinder consumption by 40–60% compared to fixed-flow delivery of the same gas mix.
Which calibration gases is this regulator compatible with?
The WG-A0177744 brass-body regulator is designed for non-reactive calibration gas mixtures: CO in nitrogen, O2 in nitrogen, 4-gas mixes (LEL/O2/CO/H2S), and similar mixtures packaged in portable non-refillable cylinders. For reactive or corrosive gases — H2S concentrations above approximately 25 ppm, SO2, Cl2, or HCN — use a stainless-steel or nickel-plated regulator body to prevent corrosion and concentration loss.
What does OSHA require for portable gas monitor calibration, and how does this regulator help?
OSHA does not mandate a universal calibration interval by name, but OSHA 29 CFR 1910.146 Appendix C recommends calibrating portable gas monitors before each use in permit-required confined space entries. NIOSH and most monitor manufacturers echo this guidance. The demand-flow delivery of this regulator ensures gas reaches the sensor at the concentration listed on the cylinder label — consistent with the accuracy required to confirm your monitor reads within OSHA's action levels and permit thresholds.
How do I read the pressure gauge to know when to replace the cylinder?
Most portable non-refillable cylinders (34 L and 58 L) arrive at 500–750 psi. As gas is consumed, pressure drops proportionally. When the gauge reads below approximately 100–150 psi, the regulator may not maintain consistent delivery pressure and concentration accuracy can drift. Replace the cylinder before reaching that threshold to keep your calibration records defensible. Call PK Safety at 800.829.9580 if you need replacement calibration gas cylinders for your WatchGas SST monitors.
Is this regulator compatible with the WatchGas SST-DOCK docking station?
The SST-DOCK automated docking station has its own integrated gas delivery connection designed for the WatchGas demand-flow system. If you're running a fully automated bump-test and calibration workflow through the SST-DOCK, verify your docking station's gas inlet fitting against this regulator's outlet before ordering. For manual calibrations — connecting directly to the instrument's calibration port — this demand-flow regulator with pressure gauge is the standard choice. Questions? Call 800.829.9580.
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