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Yellow digital manifold gauge with two wired clamp probes attached

Testo

Testo 550s AC Manifold Gauge Set with 2 Wired Temperature Clamp Probes

SKU CH-9S2Z-FH3RW

Digital manifold measures pressure and temperature on AC, refrigeration and heat-pump systems, calculates superheat and subcooling, and sends results via the Testo Smart App

  • Precise temperature readings within ±0.9 °F accuracy
  • Wide pressure range from -15 to 870 psi for diverse systems
  • Measures temperatures from -58 °F to 302 °F
  • Automatic superheat and subcooling calculations via smart app
  • Includes two wireless temperature probes and one vacuum probe

Versatile HVAC Manifold Gauge Set

The Testo 550s AC manifold gauge set delivers precise temperature and pressure readings for air conditioning, refrigeration, and heat pump systems. It supports common refrigerant types as well as A2L refrigerants. HVAC technicians gain a single instrument that covers installation, service, and maintenance tasks across multiple applications.

Wireless Probes and App Integration

The kit includes two wireless temperature clamp probes and one wireless vacuum probe for system analysis. Bluetooth connectivity links the manifold to the Testo Smart App on a smartphone or tablet for remote operation and automatic superheat and subcooling calculations. Documentation and results can be shared directly from the job site without additional hardware.

Wide Measurement Ranges Under Load

Temperature measurement spans -58 °F to 302 °F (-50 °C to 150 °C) with an accuracy of ±0.9 °F (±0.5 °C). Pressure measurement covers -15 to 870 psi (-1 to 60 bar) with ±0.5 % full-scale accuracy. These ranges maintain reliability during extended diagnostic sessions on high-pressure refrigeration and heat pump circuits.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $516.99
Pricier than about 90% of the 3,030 comparable items (median $54.99).

Specifications

No published specifications for this item yet.

Questions about this item

How long does the rechargeable battery last during a full day of pressure and temperature logging?

The testo 550s runs on a rechargeable battery designed for extended field use; typical HVAC service sessions last several hours and the unit can be topped up between jobs via USB.

Does the manifold body or the wireless probes get hot when measuring high-side pressures near 870 psi?

The manifold housing and the two wireless temperature clamp probes stay at ambient temperature during normal operation; only the refrigerant hoses carry high-pressure fluid.

Which refrigerant hoses and fittings must I already own to connect this gauge set to a system?

The kit includes the manifold block, two wireless temperature clamp probes and one wireless vacuum probe; you supply the standard 1/4 in. SAE charging hoses and any required service valves for the refrigerant type.

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