TAYLOR 44S390 Squeeze Bulb Pressure Calibrator (0–18 psi) with Dial Gauge

Overview

The TAYLOR 44S390 combines a hand-held squeeze bulb with a high-visibility dial gauge (0–18 psi) to create a simple, reliable low-pressure calibrator. Squeeze to generate pressure, fine-trim with the needle valve/bleed, and read stable pressure directly on the gauge. It’s a proven tool for HVAC, process utility, filter DP checks, leak testing and calibration of low-range transmitters and pressure switches in plants and labs.

Why technicians choose the 44S390

• Fast setup: no bench, power, or hoses required—connect and pump.

• Stable control: squeeze bulb + fine bleed for smooth approach to set-points.

• Low-pressure range: 0–18 psi (≈ 0–1.24 bar, 0–124 kPa) ideal for air/inert gas checks.

• Portable & rugged: compact assembly with protective gauge housing for field use.

• Universal use: suits transmitters, gauges, manometers, recorders and pressure switches.

Typical Features

• Medium: air / inert gases (dry & clean)

• Range: 0–18 psi (positive pressure)

• Gauge: analog dial, clear scale (psi plus secondary units on some versions)

• Connections: common process port (e.g., 1/8″ or 1/4″ NPT) with hose barb/adapter set

• Controls: squeeze bulb, inline check valve, fine bleed/needle valve

• Build: corrosion-resistant fittings; reinforced tubing

• Use case: fast point-checks, switch set-point verification, leak tests

Need to match threads, barb size, or gauge graduation? Send your required connection type and units, and we’ll ship the correct kit.

Applications

• Loop checks and quick calibration of low-pressure transmitters

• HVAC differential/room pressure verification

• Filter DP and low-pressure switches set-up

• Leak-testing of small pneumatic circuits

• Education and maintenance workshops

What you get from Seven Star LLC

• Genuine TAYLOR 44S390 with verified range and connection

• Optional adapter kit for fast hook-up to transmitters and gauges

• Same-day quotes, regional stock visibility and shipment tracking

• Calibration advice and on-site best practices

Helpful links 

• 44S390 datasheet PDF 

Key Specs 

• Handheld squeeze-bulb pressure calibrator

• Dial gauge 0–18 psi (≈ 0–124 kPa)

• Fine bleed/needle valve for stable set-points

• For air/inert gases; portable and rugged

• Ideal for low-pressure transmitters & switches

FAQ

What media can I use?

Dry, clean air or inert gases. (Not for liquids or corrosives.)

Can I fine-adjust pressure for switch set-points?

Yes—use the squeeze bulb to approach target and the bleed valve to trim precisely.

What connections are included?

Standard NPT/barb options vary by kit. Tell us your thread/barb size and we’ll supply the right adapters.

Do you offer calibration certificates?

Yes—upon request we can provide a traceable calibration for the gauge.

Call to Action

Send your required connection type, units, and quantity. We’ll confirm kit compatibility, add calibration if needed, and quote best price & lead time today.