GSM Remote Relay Switch Access Controller T201 – Temperature & Power Status Alarm

Take full control of your remote equipment with the T201 GSM Remote Relay Switch Access Controller. Designed for 2G/3G/4G networks, this compact and intelligent device lets you monitor power status, control relay switches, and receive instant SMS alerts when temperature thresholds are exceeded or power failures occur — all from anywhere in the world via your mobile phone.

Whether you're managing industrial equipment, server rooms, greenhouses, water pumps, or any remote installation, the T201 delivers reliable real-time monitoring and control without the need for an internet connection — just a GSM SIM card.

Key Features

Remote Relay Control: Switch connected devices ON or OFF via simple SMS commands from any mobile phone.
Temperature Monitoring: Continuously tracks ambient temperature and sends SMS alerts when preset high or low thresholds are triggered.
Power Failure SMS Alert: Instantly notifies you via SMS if power is lost at the monitored location, so you can act fast.
2G / 3G / 4G Compatible: Works across major GSM network bands for broad global coverage.
Access Control Ready: Supports remote access control functions — ideal for gate openers, door locks, and entry systems.
Status Monitoring: Query the current relay status and temperature readings at any time via SMS.
Compact & Easy Installation: Small form factor with straightforward wiring for quick setup in any location.
Multi-User Authorization: Supports multiple authorized phone numbers for team-based remote management.

Technical Specifications

Model: T201
Network: 2G / 3G / 4G GSM
Control Method: SMS command
Relay Output: 1 channel
Temperature Sensor: Included (external probe)
Power Input: DC 9V–24V
SIM Card: Standard SIM (not included)
Alert Types: Power failure SMS, temperature threshold SMS, relay status query

What's in the Box

1× T201 GSM Relay Controller
1× Temperature Sensor Probe
1× Antenna
1× User Manual

Ideal Applications

Remote power monitoring and management
Server room or data center temperature oversight
Greenhouse and agricultural climate alerts
Gate, garage door, or access control automation
Water pump and irrigation remote switching
Unattended site or property monitoring

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Frequently Asked Questions

Q: What networks does the T201 GSM Remote Relay Controller support?

A: The T201 supports 2G, 3G, and 4G GSM networks, giving it broad compatibility across most global mobile carriers. Simply insert a standard SIM card from your local provider to get started.

Q: How does the temperature alarm function work on the T201?

A: The T201 includes an external temperature sensor probe. You configure upper and lower temperature threshold values via SMS commands. If the monitored temperature goes above or below those set limits, the device automatically sends an SMS alert to all authorized phone numbers.

Q: Can I control the relay switch remotely from my phone?

A: Yes. Once set up with a SIM card and authorized phone numbers, you can send simple SMS commands from any mobile phone to turn the relay ON or OFF, query its current status, or check the current temperature reading — from anywhere in the world.

Q: Do I need an internet connection or app to use the T201?

A: No internet connection or smartphone app is required. The T201 operates entirely over the standard GSM voice/SMS network, making it highly reliable even in locations with limited data connectivity.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.