PTH-252 Series Plug-in Multi-Function Gas Detector

CO / Gas / Smoke / CO₂ Monitoring Options for Different Indoor Needs

The PTH-252 Series is a versatile plug-in monitoring solution designed for everyday indoor use.

Choose from five different models based on the functions you need — from basic carbon monoxide monitoring to combined detection of CO, gas, smoke, or CO₂.

All models feature a clear color display, temperature and humidity monitoring, audible alerts, a replaceable plug design, and a built-in rechargeable battery for more flexible use.

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Choose the Right Model for Your Space

PTH-252A — CO Monitor

A simple and practical choice for everyday carbon monoxide monitoring.

Monitors:

• Carbon Monoxide
• Temperature
• Humidity

Recommended for:

Home, bedroom, kitchen, garage, cabin, and RV use.

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PTH-252B — CO + Gas Monitor

Combines carbon monoxide monitoring with gas detection for spaces where additional gas awareness is needed.

Monitors:

• Carbon Monoxide
• Gas
• Temperature
• Humidity

Recommended for:

Kitchen, utility room, garage, RV, and other indoor spaces.

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PTH-252C — CO + Smoke Monitor

Combines carbon monoxide and smoke monitoring in one compact device.

Monitors:

• Carbon Monoxide
• Smoke
• Temperature
• Humidity

Recommended for:

Bedroom, living room, cabin, RV, and general indoor use.

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PTH-252D — CO + Gas + Smoke Monitor

The most versatile gas and smoke monitoring option in the PTH-252 Series.

Monitors:

• Carbon Monoxide
• Gas
• Smoke
• Temperature
• Humidity

A suitable choice for users who want multiple monitoring functions in a single device.

Recommended for:

Kitchen, garage, cabin, RV, workshop, and multi-purpose indoor spaces.

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PTH-252E — CO + CO₂ Monitor

Designed for users who want to monitor both carbon monoxide and indoor carbon dioxide levels.

Monitors:

• Carbon Monoxide
• Carbon Dioxide
• Temperature
• Humidity

Recommended for:

Bedroom, office, classroom, living room, RV, and other occupied indoor spaces.

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One Series. Five Monitoring Options.

Different spaces may require different types of monitoring.

The PTH-252 Series lets you select the model that best matches your needs without changing the overall design or operating experience.

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Clear Real-Time Display

The PTH-252 Series features a 2.0-inch color IPS display that presents monitoring data in a clear and easy-to-read format.

View important information at a glance without opening an app or checking a separate device.

Depending on the selected model, the display can show:

• Gas concentration
• CO level
• CO₂ level
• Smoke status
• Temperature
• Humidity
• Alarm status
• Battery status

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Built-In Audible Alert

Each PTH-252 model includes a built-in buzzer alert.

When the monitored value reaches the device's alarm condition, the detector provides an audible warning to help make changes in the environment easier to notice.

This allows you to keep track of indoor conditions even when you are not continuously looking at the screen.

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Plug-In Power with Built-In Battery

The PTH-252 Series is designed with both everyday plug-in use and added flexibility in mind.

It operates from a standard wall outlet and also includes a built-in 1000mAh lithium battery.

Dual-Power Design

• 100–240V AC input
• Built-in 1000mAh rechargeable battery
• Plug-in operation for continuous everyday use
• Temporary portable use when unplugged

This design makes placement more flexible compared with a traditional plug-only detector.

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Replaceable Plug Design

The replaceable plug structure allows the device to support different plug configurations for different markets.

This makes the PTH-252 Series suitable for use across a wider range of regions and outlet standards.

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Temperature & Humidity Monitoring

All five models include built-in temperature and humidity monitoring.

Along with gas-related data, you can also check the surrounding indoor environment directly from the screen.

Temperature Range

-10°C to 50°C / 14°F to 122°F

Temperature Accuracy

±1.5°C / ±2.7°F

Humidity Range

0–95% RH

Humidity Accuracy

±5% RH

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Compact Design for Everyday Spaces

With a compact body size of approximately:

120 × 60 × 54 mm

the PTH-252 Series can be installed directly into a wall outlet without taking up unnecessary space.

Its clean, modern design works well in a variety of indoor environments.

Suitable for:

• Home
• Bedroom
• Living Room
• Kitchen
• Garage
• Office
• Cabin
• RV & Camper
• Workshop

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Model Detection Specifications

PTH-252A

CO Detection Range:
0–1000 ppm

Resolution:
1 ppm

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PTH-252B

CO Detection Range:
0–1000 ppm

Gas Detection:
Level 1–3

Resolution:
CO: 1 ppm

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PTH-252C

CO Detection Range:
0–1000 ppm

Smoke Detection:
Level 1–3

Resolution:
CO: 1 ppm

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PTH-252D

CO Detection Range:
0–1000 ppm

Gas Detection:
Level 1–3

Smoke Detection:
Level 1–3

Resolution:
CO: 1 ppm

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PTH-252E

CO Detection Range:
0–1000 ppm

CO₂ Detection Range:
400–5000 ppm

Resolution:
CO: 1 ppm

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Product Specifications

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Which Model Should You Choose?

Choose PTH-252A if:

You mainly need CO monitoring with temperature and humidity.

Choose PTH-252B if:

You want CO + gas monitoring.

Choose PTH-252C if:

You want CO + smoke monitoring.

Choose PTH-252D if:

You want the most functions, including CO + gas + smoke monitoring.

Choose PTH-252E if:

You mainly care about CO + CO₂ and indoor air conditions.

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Smart Monitoring for Different Indoor Needs

From simple carbon monoxide monitoring to more comprehensive multi-function detection, the PTH-252 Series gives you the flexibility to choose the functions that matter most for your space.

Five Models. One Simple Choice.

Select your preferred monitoring combination and choose the PTH-252 model that fits your needs.