SensMax PT100 Wireless Temperature Sensor with Probe
- Temperature range:-50℃ ..+ 200℃
- Measurement accuracy :±0.2℃
- Measurement resolution :0.1℃
- Measurement period :5 minutes
- Battery type :2xAAA batteries, replaceable
- Battery life:up to 5 years
- Temperature probe length:1 m
Temperature range -50°C…+200°C, 1 m probe, accuracy ±0.2°C, resolution 0.1°C. Reliable probe-based monitoring for ovens, freezers, HVAC ducts, liquids, and laboratories.
SensMax SensGuard PT100 Wireless Temperature Sensor with Probe
The SensGuard PT100 wireless temperature sensor with probe is designed for remote temperature monitoring in cold storage, HVAC systems, industrial equipment, food production, laboratories and other environments where the measuring point is difficult to reach with a standard built-in temperature sensor.
The sensor uses an external PT100 RTD probe to measure temperatures from -50°C to +200°C. The 1 m stainless steel probe can be placed inside a freezer, duct, tank, equipment housing or process area, while the wireless sensor body remains mounted outside the monitored zone.
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 sends probe temperature readings wirelessly to a SensGuard gateway and cloud monitoring portal.
At a Glance
- Wireless temperature sensor with external PT100 RTD probe.
- Probe measurement range from -50°C to +200°C.
- ±0.2°C measurement accuracy for industrial and storage monitoring.
- 0.1°C measurement resolution for clear temperature trend analysis.
- 1 m stainless steel probe cable for freezers, ducts, tanks and equipment areas.
- 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 5 years at the default measurement interval.
- IP54 enclosure for the sensor body.
How the PT100 Sensor Works
The PT100 sensor measures temperature through an external stainless steel RTD probe. The probe is placed in the required measurement area, while the wireless sensor body can stay outside the freezer, duct, oven housing, tank or equipment area.
Every 5 minutes, the sensor records a temperature reading and sends it 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.
Probe Temperature Monitoring
The external probe makes the PT100 suitable for locations where the sensor body should not be placed directly in the measured environment. For example, the probe can be inserted into a freezer or duct, while the sensor body remains outside for better radio communication and easier battery replacement.
This design is useful for high-temperature areas, cold storage, HVAC ducts, liquid tanks, machinery, ovens and other applications where a built-in sensor would not be practical.
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.
PT100 probe installation for freezers, ducts, tanks, process equipment and other hard-to-reach measurement points.
Compatible Gateway and Cloud Monitoring
The PT100 sensor requires a compatible SensGuard gateway for online monitoring. The gateway receives wireless readings from the sensor 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 is suitable for wireless temperature monitoring where a probe is required because the measurement point is inside equipment, storage, a duct, a tank or another hard-to-reach area.
- Commercial refrigeration for supermarkets, grocery stores, display cases and cold rooms.
- Cold storage and logistics for warehouses, walk-in freezers and temperature-sensitive goods.
- HVAC and ventilation for duct temperature monitoring and technical-area supervision.
- Industrial equipment for machinery, process pipelines and production environments.
- Food production for ovens, cooling tunnels, holding areas and process temperature control.
- Laboratories for temperature monitoring in equipment and storage areas.
- Server rooms and data centers for localized monitoring around racks and equipment.
- Museums and archives for climate-sensitive collections and storage areas.
Business Benefits
Wireless probe temperature monitoring helps organizations reduce manual checks and detect temperature changes before they create product loss, service interruptions or quality problems. The external probe allows temperature measurement in the exact required point, while the sensor body remains accessible for service.
Cloud reporting and alerts help teams react faster, maintain temperature history and support internal quality control. The wireless design also makes it easier to add monitoring points in existing facilities without running long signal cables to each measurement point.
- monitor probe temperatures from -50°C to +200°C;
- reduce manual temperature checks;
- receive alerts when thresholds are exceeded;
- keep historical reports for quality control and audit needs;
- place the probe in the monitored zone while keeping the sensor body accessible;
- add new monitoring points without running sensor cables to the gateway.
Example in Action
A bakery installs SensGuard PT100 sensors near oven exits and cooling tunnels. The probes are placed in the required measurement points, while the wireless sensor bodies are mounted outside the hottest areas where they can communicate with the SensGuard gateway.
The bakery team receives temperature reports and alerts in the cloud monitoring platform. When temperature trends show overheating or cooling delays, technicians can adjust equipment settings before product quality is affected.
Technical Details
| Device model | SensGuard PT100 |
|---|---|
| Technical documentation and installation manuals | https://docs.sensmax.eu/sensguard-monitoring-system/pt100-standard-accuracy-datasheet/ |
| Application | Wireless temperature sensor with external probe, industrial temperature monitoring, freezer probe monitoring, cold storage monitoring, oven and baking equipment monitoring, HVAC duct temperature monitoring, liquid tank temperature monitoring and laboratory temperature control |
| Sensor element | PT100 RTD |
| Measurement range | -50°C to +200°C, probe measurement range |
| Sensor body operating temperature | -20°C to +55°C |
| Measurement accuracy | ±0.2°C |
| Measurement resolution / step | 0.1°C |
| Measurement interval | 5 minutes |
| Probe material | Stainless steel SUS304 |
| Probe cable length | 1 m, longer options available upon request |
| Wireless frequency | 868 MHz ISM band |
| Transmission power | +14 dBm, 25 mW |
| Communication range | Up to 150 m in clear line-of-sight conditions |
| Data encryption | AES-128 |
| Battery type | 2x AAA 1.5V batteries, lithium recommended for sub-zero temperatures |
| Battery life | Up to 5 years at default measurement interval |
| Enclosure protection rating | IP54 |
| Dimensions | 67 × 67 × 25 mm, sensor body |
| Mounting | High-bond double-sided adhesive tape for smooth surfaces |
| Compliance | CE and RoHS |
FAQ SensGuard PT100 Sensor
- What is the measurement range of the PT100 sensor?
The external probe measures temperatures from -50°C to +200°C. - What is the measurement accuracy?
The measurement accuracy is ±0.2°C. - 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 a freezer, oven or high-temperature area?
The external probe is designed for the measured zone, 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 5 years at the default measurement interval. - 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 wireless temperature monitoring with an external probe for freezers, HVAC ducts, tanks, ovens, industrial equipment or storage areas? SensMax can help you choose the right PT100 sensor and SensGuard gateway configuration for your project.
Share your temperature range, probe location, number of monitoring points, distance to the gateway and reporting requirements, and we will help define the correct setup.
Request a quote for SensGuard PT100 Sensor
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