SensMax SensGuard PT100 High Accuracy Wireless Temperature Sensor with Probe

The SensGuard PT100 High Accuracy wireless temperature sensor is designed for precise temperature monitoring in extreme cold and high-temperature environments. It uses an external PT100 RTD probe to measure temperatures from -200°C to +200°C, making it suitable for laboratories, deep freezers, cryogenic storage, industrial processes and critical temperature monitoring applications.

The sensor supports two software-selectable precision modes. High-accuracy mode provides a 0.01°C measurement step for detailed monitoring, while standard-accuracy mode provides a 0.1°C step for longer battery life. Measurement accuracy is ±0.1°C.

Readings are measured every 5 minutes and sent wirelessly to a compatible SensGuard gateway, such as SensGuard TCP LR X2. The gateway forwards data to the SensGuard cloud monitoring platform, where users can view reports, monitor trends and receive alerts when temperature limits are exceeded.

SensGuard PT100 High Accuracy sends probe temperature readings wirelessly to a SensGuard gateway and cloud monitoring portal.

At a Glance

• Wireless high-accuracy temperature sensor with external PT100 RTD probe.
• Extreme probe measurement range from -200°C to +200°C.
• ±0.1°C measurement accuracy for critical monitoring tasks.
• Selectable resolution modes - 0.01°C in high-accuracy mode or 0.1°C in standard mode.
• 1 m stainless steel probe cable for placing the probe inside freezers, equipment, ducts or process zones.
• Wireless 868 MHz communication to a compatible SensGuard gateway.
• Up to 150 m communication range in clear line-of-sight conditions.
• AES-128 encrypted data transmission between sensor and gateway.
• Battery-powered operation with two replaceable AAA batteries.
• Battery life up to 1.5 years in high-accuracy mode or up to 5 years in standard-accuracy mode.
• IP54 enclosure for the sensor body.

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How the PT100 High Accuracy Sensor Works

The PT100 High Accuracy sensor measures temperature through an external stainless steel RTD probe. The probe can be placed inside a freezer, storage chamber, duct, equipment housing or process area, while the wireless sensor body remains mounted outside the monitored zone where it can communicate with the gateway.

The sensor records a temperature reading every 5 minutes. These readings are transmitted over an AES-128 encrypted 868 MHz radio channel to a compatible SensGuard gateway. The gateway then sends the data to the SensGuard cloud platform for reporting, alerts and historical analysis.

The device includes a network diagnostic button and status LED, so users can check whether the sensor is connected to the gateway and cloud system.

High-Accuracy and Standard-Accuracy Modes

The sensor can work in two precision modes. High-accuracy mode provides a 0.01°C measurement step and is used when small temperature changes must be monitored closely. Standard-accuracy mode provides a 0.1°C measurement step and helps extend battery life.

The selected mode is stored in the sensor memory and remains active after battery replacement. This makes the device suitable for both high-precision laboratory monitoring and longer-term industrial or storage applications.

Installation

The sensor body is mounted using high-bond double-sided adhesive tape on a smooth surface such as plastic, metal, glass or a painted wall. This allows quick installation without drilling or additional mounting hardware.

After mounting the sensor body, place the external 1 m probe in the area where temperature must be measured. The sensor body should be positioned where it remains within wireless range of the SensGuard gateway and within the allowed operating temperature range for the electronics.

The sensor is shipped powered off to protect the batteries during storage and transport. To start operation, press and release the JOIN button and register the sensor in the SensGuard cloud portal using the connection wizard.

Typical applications include freezers, laboratories, HVAC systems, industrial equipment and temperature-critical storage.

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Compatible Gateway and Cloud Monitoring

The PT100 High Accuracy sensor requires a compatible SensGuard gateway for online monitoring. The gateway receives wireless sensor readings and forwards them to the SensGuard cloud platform.

• SensGuard TCP LR X2 wireless gateway and data collector for SensGuard monitoring sensors.

In the cloud platform, users can review temperature history, configure thresholds, receive alerts and export monitoring reports. This supports daily supervision, quality control and audit documentation.

Typical Applications

SensGuard PT100 High Accuracy is suitable for temperature monitoring tasks where standard wireless sensors are not enough because of extreme temperature range or precision requirements.

• Cryogenic and deep-freeze storage for ultra-low temperature monitoring in laboratories, medical freezers and bio-banks.
• Scientific laboratories for high-precision temperature monitoring during experiments and validation work.
• Industrial processing for temperature logging in manufacturing, chemistry, test chambers and controlled heating processes.
• Cold chain logistics for temperature verification of perishable goods, medical items and pharmaceuticals.
• HVAC systems for monitoring ducts, technical areas, heating loops and cooling systems.
• Server rooms and data centers for localized temperature monitoring near high-density equipment.
• Food processing and storage for freezer, cold room and process temperature control.

Business Benefits

High-accuracy temperature monitoring helps organizations detect small temperature changes before they become costly problems. This is important for laboratories, pharmaceutical storage, cold chain logistics, industrial testing and other processes where temperature deviations can affect product quality or research results.

Wireless installation reduces cabling work and makes it easier to add monitoring points in existing facilities. Cloud reports and alerts help teams react faster, document temperature history and support internal quality control.

• monitor extreme temperatures from -200°C to +200°C;
• detect small temperature changes with ±0.1°C accuracy;
• reduce manual temperature checks;
• receive alerts when thresholds are exceeded;
• keep historical reports for quality control and audit needs;
• install new monitoring points without running sensor cables to the gateway.

Example in Action

A university laboratory uses SensGuard PT100 High Accuracy sensors to monitor ultra-low temperature storage used for pharmaceutical research. The probe is placed inside the storage area, while the wireless sensor body is mounted outside where it can communicate with the SensGuard gateway.

The laboratory team receives regular temperature readings in the cloud portal and can review detailed history for each monitored storage unit. If the temperature moves outside the configured limits, the monitoring system can alert staff so they can react before sensitive materials are affected.

Technical Details

FAQ SensGuard PT100 High Accuracy Sensor

• What is the measurement range of the PT100 High Accuracy sensor?
  The external probe measures temperatures from -200°C to +200°C.
• What is the measurement accuracy?
  The measurement accuracy is ±0.1°C.
• What is the difference between high-accuracy and standard-accuracy mode?
  High-accuracy mode uses a 0.01°C measurement step. Standard-accuracy mode uses a 0.1°C measurement step and provides longer battery life.
• How long is the probe cable?
  The standard probe cable length is 1 m. Longer options are available upon request.
• Can the sensor body be placed inside ultra-low temperature storage?
  The external probe can measure down to -200°C, but the sensor body operating temperature is -20°C to +55°C. The sensor body should be installed within this allowed range.
• Which gateway is required?
  The sensor requires a compatible SensGuard gateway, such as SensGuard TCP LR X2.
• How often are measurements sent?
  The measurement interval is 5 minutes.
• What batteries does the sensor use?
  The sensor uses two AAA 1.5V batteries. Lithium batteries are recommended for sub-zero temperatures.
• How long does the battery last?
  Battery life is up to 1.5 years in high-accuracy mode or up to 5 years in standard-accuracy mode.
• How is the sensor mounted?
  The sensor body is mounted using high-bond double-sided adhesive tape on a smooth surface.

Ready to Get Started?

Need high-accuracy wireless temperature monitoring for laboratories, freezers, industrial equipment or critical storage? SensMax can help you choose the right PT100 High Accuracy sensor and SensGuard gateway configuration for your project.

Share your temperature range, required accuracy, probe location, number of monitoring points and reporting requirements, and we will help define the correct setup.

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