YTNL refrigerant gauges support air-conditioning installation, charging, leak checks and refrigeration maintenance. Separate high- and low-side configurations provide pressure and refrigerant-temperature scales for manifold equipment, compressors, evaporators and condensers. Choose the dial calibrated for the refrigerant and pressure range in use.
A 304 stainless steel case, copper-alloy Bourdon tube and movement, and polycarbonate window form the measuring assembly. Silicone-oil filling damps pointer movement, while a damping screw reduces the effect of pressure pulsation.
| Parameter | Specification |
|---|---|
| Accuracy | Class 1.6 standard; ±1%FS versions according to instrument marking |
| Dial diameter | 55mm |
| Case / window | 304 stainless steel / polycarbonate |
| Movement and sensing element | Copper-alloy mechanical movement and Bourdon tube |
| Filling / pointer | Silicone oil / black-coated aluminum pointer |
| Connection | 1/4in SAE; specify the required connection configuration |
| Ambient temperature | -5°C to 60°C for the standard version |
| Medium temperature | Maximum 60°C for the standard version |
| Ingress protection | IP54 |
| Refrigerant scale options | R22, R134a, R404A, R407C and R410A; combinations vary by dial |
| Scale configuration | Low-side version | High-side version |
|---|---|---|
| YTNL-60ZT MPa scale | -0.1 to 2.5MPa | -0.1 to 3.8MPa |
| kgf/cm² / psi scale | 0–35kgf/cm² / 0–500psi, with a separate vacuum sector | 0–55kgf/cm² / 0–800psi |
| bar / psi scale | -1 to 16bar; positive scale to approximately 230psi | -1 to 35bar; positive scale to approximately 500psi |
These are different dial configurations. Vacuum sectors may be marked in cmHg or inHg; read the unit beside the relevant sector. Choose the actual pressure and refrigerant scales for each gauge position. The high- and low-side versions are separate instruments.
Radial, axial, axial front-flange and radial rear-flange mounting arrangements are available across the family. The illustrated flanged YTNL-60ZT has a 15.6mm threaded projection and a 31.1mm case radius. Specify mounting, thread, pressure range, units and refrigerant scale together.
For steady pressure, use up to three-quarters of full scale; for fluctuating pressure, use up to two-thirds. Wait for the damped pointer to settle before taking a reading. Keep the eye level with the pointer and read the matching refrigerant-temperature scale.
Check zero while unpressurized. Stop using a gauge with persistent pointer oscillation, sticking, zero displacement or leaking/cloudy filling oil. Inspect the case and connection regularly and arrange professional calibration every 6–12 months.
