TOC-750S Gas Sampler Detector

Effortless Installation and Integration
Save up to 70% on installation costs with our Sentinel+™ two-core, polarity-independent cabling. The TOC-750S is ready to use with one-click auto-setup and self-check, making commissioning fast and straightforward. It can also repurpose existing wiring, offering a cost-effective upgrade path. Fully compatible with third-party systems, the TOC-750S ensures seamless integration into your existing safety infrastructure.

Advanced Piezo Pump Technology
Designed for hard-to-reach areas, the TOC-750S uses field-proven Piezo pump technology to draw gas samples from up to 20 metres away at flow rates of up to 1.5L/min. With no moving parts, the pump offers a longer service life and near-silent operation. It is compatible with a wide range of collector cones, filters, and end-of-line units, providing flexible solutions for varied sampling needs.

Unmatched Versatility
Supported by Sentinel+™ digital communication, the TOC-750S offers continuous sampling and monitoring for round-the-clock protection. It can detect a wide range of gases and is the only low-level N₂O detector currently available, making it a unique choice for specialised applications.

Peace of Mind with Proven Reliability
Proudly designed and manufactured in the UK, the TOC-750S is backed by over a century of innovation and a 10-year guarantee. All compliance is supported by third-party certification, ensuring complete confidence in performance and reliability.

Continuous Protection, Not Just Sampling
Unlike standard diffusion detectors or conventional sequential samplers, the TOC-750S continuously monitors hazardous areas, only pausing briefly for automatic zeroing and calibration. Gases are drawn from the hazard zone to the detector, which can be placed in safer, more accessible areas. Combined with a wide range of compatible accessories, the TOC-750S is the ultimate problem solver across countless applications.

Zero Port Technology
Our unique Piezo pump features an additional zeroing port, enabling periodic automatic zeroing for exceptional stability. This ensures highly accurate detection at lower alarm points, broader detection ranges, and greater long-term reliability.

Built on the Sentinel+™ Platform
The TOC-750S operates on our Sentinel+™ addressable gas detection system, allowing the sampler to be placed anywhere on the network alongside Safe Area and ATEX detectors, beacon sounders, and sampling accessories. Key features include:

• Auto-find

• Auto-recognition

• Auto-update

• Downloadable status reports

Sentinel+™ technology ensures fast, error-free installation with ultimate system flexibility, supporting alarms, plant shutdown hardware, and communication to BMS and similar systems.

With minimal cabling and maximum reliability, the TOC-750S sets a new standard in addressable gas sampling detection.

Gas Types

Long Life Pellistor

• General Flammable Gases 0-100% LEL

Infrared

• Carbon Dioxide (CO₂) 0-5% VOL
• Carbon Dioxide (CO₂) 0-100% VOL
• Carbon Dioxide (CO₂) 0-5,000ppm
• General Flammable Gases 0-100% LEL
• Nitrous Oxide (N₂O) 0-1,000ppm
• Refrigerant Gases 0-2,000ppm
• Sulphur Hexafluoride (SF₆) 0-1,000ppm

Electrochemical

• Carbon Monoxide (CO) 0-100ppm
• Dichloroethane (DCE) 0-600ppm
• Ethylene (C₂H₄) 0-200ppm
• Ethylene Oxide (C₂H₄O) 0-100ppm
• Formaldehyde (CH₂O) 0-5ppm
• Formaldehyde (CH₂O) 0-50ppm
• Hydrogen (H₂) 0-1,000ppm
• Hydrogen Chloride (HCl) 0-10ppm
• Hydrogen Cyanide (HCN) 0-10ppm
• Hydrogen Fluoride (HF) 0-10ppm
• Hydrogen Peroxide (H2O2) 0-10ppm
• Hydrogen Sulfide (H₂S) 0-50ppm
• Nitric Acid (HNO₃) 0-5,000ppm
• Nitric Oxide (NO) 0-5ppm
• Nitrogen Dioxide (NO₂) 0-5ppm
• Phosphine (PH₃) 0-5ppm
• Silane (SiH₄) 0-10ppm
• Sulfur Dioxide (SO₂) 0-5ppm

Photoionisation (PID)

• VOCs 0-50ppm
• VOCs 0-100ppm
• VOCs 0-200ppm
• VOCs 0-2,000ppm
• VOCs 0-5,000ppm

Ionic Ammonia

• Ammonia 0-1,000ppm

Long-Life Oxygen

• Oxygen (O₂) 0-25% VOL

Sampler with Long-Life Zero-Port Filter

• General Flammable Gases 0-100% LEL
• Nitrous Oxide (N₂O) 0-1,000ppm