Humidity & Pressure
DT722 Humidity & Temperature Transmitter
Stainless steel humidity and temperature transmitter for harsh environments, up to 150 °C.
DO
DwyerOmega
Magnehelic Differential Pressure Gauge
Differential pressure gage indicating positive, negative or differential pressure, accurate within 2 % (1 % with -HA option).
Key Features
- Ranges from 0–0.25 in w.c. up to 0–20 psi, plus metric, zero-centre and air-velocity scales
- ±2 % full-scale accuracy (±1 % with -HA high-accuracy option)
- No manometer fluid — resists shock, vibration and over-pressure
- Weatherproof to IP67
- Optional adjustable set-point indicator (-SP)
- Surface, flush or pipe mounting
Overview
The Dwyer Magnehelic is the industry standard for low differential-pressure measurement in HVAC, cleanroom and filter-monitoring applications. Rugged die-cast aluminium case, unmatched accuracy of ±2 % and no liquid columns to spill.
Working Principle
Differential pressure deflects a silicone-rubber diaphragm connected to a helix magnet. The rotating magnetic field is followed by a helix magnet on the pointer shaft, delivering frictionless indication with no wetted moving parts.
Applications
Benefits
- Zero maintenance for years of service
- Vibration and shock resistant
- Available with pressure switch for control loops
Technical Specifications
| Range | 0–0.25 in w.c. up to 0–20 psi (see datasheet model table) |
|---|---|
| Accuracy | ±2 % FS (±3 % on -0, -100PA, -125PA, -10MM; ±4 % on -00, -60PA, -6MM); -HA option ±1 % |
| Pressure Limits | -20 in Hg to 15 psig (MP option 35 psig, HP option 80 psig) |
| Overpressure | Relief plug opens at approx. 25 psig (standard gages) |
| Housing | Die-cast aluminum case and bezel, acrylic cover, IP67 |
|---|---|
| Temperature Limits | 20 to 140 °F (-6.67 to 60 °C) |
| Size | 4" dial face |
| Process Connections | 1/8" female NPT duplicate high/low taps |
| Weight | 510 g (MP & HP 963 g) |
Downloads
Datasheet (PDF)PDF
Frequently Asked Questions
What warranty is offered on this product?
All Tetracon-supplied instruments carry the original manufacturer warranty (typically 12–24 months) plus first-line local support from our Islamabad service centre.
Do you provide installation and commissioning?
Yes. Our manufacturer-trained engineers offer on-site installation, commissioning and startup training anywhere in Pakistan.
Are spares and calibration available locally?
Common spares are held in local stock. Calibration is available at our lab or on-site with NIST-traceable reference standards.
How long is the typical lead time?
Stocked items ship within 3–5 working days; engineered configurations typically 6–10 weeks depending on manufacturer schedule.
Request a Quote — Magnehelic Differential Pressure Gauge
Complete the form below and one of our engineers will respond within 1 working day with pricing and lead time. Prefer email? Contact our sales team.
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