Testo 549i Smart High-Pressure Gauge For Refrigeration Systems

Testo 549i Smart High-Pressure Gauge for Refrigeration Systems

Product Introduction

The Testo 549i is a compact, smartphone-operated high-pressure gauge designed for wireless diagnostics of air conditioning and refrigeration systems. With a measurement range of -15 to 870 psi (-1 to 60 bar), it enables precise pressure monitoring while eliminating the need for traditional hoses—reducing refrigerant loss during servicing. Controlled via the testo Smart Probes App, it auto-calculates evaporation/condensation temperatures and supports real-time data visualization, making it an essential tool for mobile technicians.

Product Features

Measurement Capabilities

Wide Pressure Range:

-15 to 870 psi (-1 to 60 bar) with ±0.5% full-scale accuracy.

0.01 psi/bar resolution for detailed readings.

Hoseless Design:

Direct connection to 7/16 in. UNF pressure ports, minimizing refrigerant loss.

Media Compatibility:

Suitable for CFC, HFC, HCFC, nitrogen, water, and CO₂ systems.

Wireless Connectivity & App Functions

Bluetooth 4.0 Integration:

Pairs with iOS/Android devices (range ~65 ft/20 m) for remote operation.

testo Smart Probes App:

Auto-calculate evaporation/condensation temperatures.

Data display as graphs/tables; export to PDF/Excel.

Real-time monitoring for hard-to-reach pressure ports.

Design & Usability

Portable & Lightweight:

5×1×1 in. (125×32×31 mm), 5.52 oz (156.6 g) for one-handed use.

45° connector allows easy access to tight spaces.

Battery & Durability:

3x AAA batteries (150-hour life).

Operating temp: -4 to 122°F (-20 to 50°C).

Included Components

Testo 549i high-pressure gauge

Batteries

Calibration protocol

Quick start guide

Technical Specifications

Xi'an Kacise Optronics Co.,Ltd. is a professional manufacturer of  measuring instruments , located in China xi’an City. Since 2008, Xi'an Kacise focused on the development and production of pressure, level and flow measuring instruments .

We have been specializing in manufacturing pressure, level and flow measuring instruments and related products for 10 years. Based on experienced technical and management personnel, through efforts of our entire staff, we have become a professional measuring instrument manufacturer and solution provider. And we are continuously trying to improve product quality.

Xi'an Kacise is qualified with ISO 9001-2008, GJB 9001B-2009, CE, intrinsic safety explosion-proof and isolated safety explosion-proof certificates, etc. which ensure that our products comply with international standards.

Kacise sensors have already been exported to America, Spain, Australia, Chile and 20 other countries and regions, and received many favorable feedbacks. Our overseas distributers are also increasing. We regard “reasonable prices, efficient production time and good after-sales service” as our tenet, and hope to cooperate with more customers for mutual development.

Our goal is simple: to sell the best products at the best prices, and provides industry-leading customer service. We personally get to know each of our customers, and we know how to discover the most valuable part of our business , to help others achieve their goals.