Testo 316-3 Refrigerant Leak Detector | Heated Diode | 0563 3163

Testo 316-3 Refrigerant Leak Detector — Patented Heated Diode Sensor | SKU: 0563 3163

The Testo 316-3 is a portable refrigerant leak detector using a patented heated diode sensor for detecting halogenated refrigerants including R22, R134a, R404A, R410A, R507, and compatible blends. With sensitivity down to 0.02 oz/yr and two selectable sensitivity levels, the 316-3 is suited to HVAC/R technicians who need reliable, calibrated leak detection for residential and commercial AC and refrigeration service.

The 316-3 ships with a calibration certificate — useful for technicians working in environments where documented calibration is required. One-button operation and automatic zeroing keep the workflow simple on the job.

Confirm A2L refrigerant compatibility (e.g. R32) against the Testo 316-3 manufacturer datasheet before ordering. Refrigerant handling requires appropriate trade qualifications — confirm licensing requirements with the relevant authority in your state or territory.

Key Features

• Patented heated diode sensor — designed for halogenated refrigerant detection
• High sensitivity: down to 0.02 oz/yr
• Two selectable sensitivity levels: high and low
• Automatic zeroing — no manual field adjustment required
• One-button operation for straightforward use on the job
• Calibration certificate included — useful for documented service environments
• 6-hour continuous battery life
• 370mm probe length for reaching tight spaces
• Operating temperature range: -20°C to +50°C
• Carry case included for transport and storage

Compatible Refrigerants

R22, R134a, R404A, R410A, R507, and compatible halogenated blends. Confirm compatibility with your specific refrigerant — particularly A2L refrigerants such as R32 — against the Testo 316-3 datasheet before use.

Specifications

• Sensing element: Patented heated diode
• Sensitivity range: 0.15 oz/yr (low) to 0.02 oz/yr (high)
• Sensitivity levels: High and low selectable
• Zeroing: Automatic
• Operating temperature: -20°C to +50°C
• Battery life: 6 hours continuous
• Probe length: 370mm
• Weight: 18 oz (including batteries)
• Dimensions: 10.6 x 2.4 x 2.4 in
• SKU / Order code: 0563 3163
• Warranty: 2 years from date of purchase (consumables excluded)

What’s Included

• Testo 316-3 Refrigerant Leak Detector
• Sensor head
• Transport case
• Calibration certificate
• Batteries
• Filter

Best For

• HVAC/R technicians detecting halogenated refrigerant leaks in residential and commercial systems
• Technicians who need a calibration certificate for documented leak detection records
• Service and maintenance on R22, R134a, R404A, R410A, and R507 systems
• Technicians who prefer Testo precision instruments with factory calibration

Check Before Ordering

• Confirm refrigerant compatibility — particularly A2L refrigerants such as R32 — against the Testo 316-3 datasheet
• Heated diode sensors can degrade with repeated exposure to high refrigerant concentrations — monitor sensor condition regularly
• Replacement filters are consumables — stock spares to avoid downtime
• Refrigerant handling requires appropriate trade qualifications — confirm licensing requirements in your state or territory
• Warranty: 2 years from date of purchase; consumables excluded — confirm current terms at time of purchase

Frequently Asked Questions

Does the Testo 316-3 detect R32?

The 316-3 is designed for halogenated refrigerants including R22, R134a, R404A, R410A, and R507. Confirm R32 and A2L refrigerant compatibility against the Testo manufacturer’s current datasheet before ordering.

Why does the 316-3 include a calibration certificate?

The calibration certificate documents that the instrument was calibrated to manufacturer standards at the time of manufacture. This is useful for technicians working in environments where calibration records are required. Confirm recalibration requirements and intervals with Testo or your relevant authority.

How long does the heated diode sensor last?

Confirm sensor life against the Testo 316-3 datasheet. Heated diode sensor life is affected by exposure frequency and refrigerant concentration levels — repeated exposure to high concentrations will shorten sensor life.

What replacement filters does the 316-3 use?

Confirm the correct replacement filter part number with HVAC Trade Supply or the Testo datasheet before ordering. Replace filters regularly to protect the sensor from moisture and contaminants.

What is the warranty?

2 years from date of purchase. Consumables including filters, batteries, and sensors are excluded. Confirm current terms with HVAC Trade Supply at time of purchase.

How fast is delivery across Australia?

We dispatch orders Australia-wide. Delivery times vary by location — see our shipping information page for current estimates and options.

Why Buy from HVAC Trade Supply?

• Genuine Testo products — not grey market or parallel imports
• Calibration certificate included with every unit
• Fast dispatch Australia-wide
• Secure checkout with multiple payment options
• Trade account options available for regular buyers
• Expert product advice from an HVAC trade-focused team

Need help choosing between Testo leak detectors or comparing with Fieldpiece and Inficon options? Contact our team or browse our full refrigerant leak detector range.