Testo 549 Digital Manifold for Refrigeration Systems
Product Introduction
The Testo 549 digital manifold is a professional-grade tool
designed to replace analog gauges, offering precise pressure
measurement and intelligent temperature calculations for 60+
refrigerants. With a rugged build and user-friendly interface, it
measures high/low side pressures and instantly displays
saturation/evaporation temperatures. When paired with optional
temperature probes, it enables automatic superheat/subcooling
calculations, making it an essential device for HVAC/R technicians.
Product Features
Dual Pressure Sensing:
Pressure range: -15 to +870 psi (-1 to +60 bar) with ±0.5%
full-scale accuracy.
3x 1/4"" SAE probe connections for high/low side and vacuum
measurements.
Refrigerant Versatility:
Preloaded with 60 refrigerant profiles (e.g., R410A, R32, CO₂),
expandable via Testo Service.
Temperature Integration:
Optional NTC probes enable -58 to 302°F (-50 to 150°C) temperature
measurement (±0.5°C accuracy).
Auto-calculate superheat/subcooling with real-time data.
Design & Usability
Intuitive Display:
Large 2-line backlit LCD for clear readings in low-light
environments.
Rugged Construction:
IP42 protection against dust/splashes; 37.39 oz (1060 g) for
durable field use.
2-way valve block with sight glass for visual refrigerant flow
inspection.
Battery Life:
Up to 250 hours (display/Bluetooth off) for extended field
operations.
Included Components
Testo 549 digital manifold
Rechargeable battery pack
Calibration certificate
User manual
Technical Specifications
| Temperature |
| Measuring range | -58° to 302 °F / -50 to +150 °C |
| Accuracy | ±0.9 °F / ±0.5 °C |
| Resolution | 0.1 °F / 0.1 °C |
| Probe connection | 2 Temperature NTC measurement channels |
| Pressure measurement |
| Measuring range | -15 to +870 psi / -1 to +60 bar |
| Accuracy | ±0.5 % Fs |
| Resolution | 0.14 psi / 0.01 bar |
| Probe connection | 3 x 1/4" SAE |
| Overload rel. (high pressure) | 943 psi / 65 bar |
| Vacuum |
| Measuring range | -15 to 0 psi (indication) / -1 to 0 bar |
| General technical data |
| Weight | 37.39 oz. / 1060 g |
| Dimensions | 7.87 x 4.29 x 2.48 in. / 200 x 109 x 63 mm |
| Operating temperature | -4° to 122 °F / -20 to +50 °C |
| Protection class | IP42 |
| Product colour | Black |
| Battery life | approx. 250h (display light off, Bluetooth off) |
| Refrigerants in instrument | R114; R12; R123; R1233zd; R1234yf; R1234ze; R124; R125; R13; R134a;
R22; R23; R290; R32; R401A; R401B; R402A; R402B; R404A; R407A;
R407C; R407F; R407H; R408A; R409A; R410A; R414B; R416A; R420A;
R421A; R421B; R422B; R422C; R422D; R424A; R427A; R434A; R437A;
R438A; R442A; R444B; R448A; R449A; R450A; R452A; R452B; R453a;
R454A; R454B; R454C; R455A; R458A; R500; R502; R503; R507; R513A;
R600a; R718 (H₂O); R744 (CO₂) |
| Refrigerants update by Testo Service | R11; FX80; I12A; R1150; R1270; R13B1; R14; R142B; R152A; R161;
R170; R227; R236fa; R245fa; R401C; R406A; R407B; R407D; R41; Ra11A;
R412A; R413A; R417A; R417B; R417C; R422A; R426A; R508A; R508B;
R600; RIS89; SP22 |
| Storage temperature | -4° to 140 °F / -20 to +60 °C |
