Highlights | RF612 WiFi Temperature Transmitter
- Battery or Mains Powered
- Integral Temperature Sensor
- Add Up to 4 External Channels
- Connects to your Local WiFi Network
- Designed for Easy Self-Installation

Easy to scale up as and when required with a choice of Lumberg Adaptors and a host of both single and duplex probes.
Ambient Storage
Perfect for monitoring the temperature of your ambient storage and work areas with the integral sensor, in addition to external channels.
Temperature
Allows up to four external points of temperature measurement to be monitored, in addition to the ambient temperature.
Secure WiFi Connectivity
The Diligence 600 WiFi Monitoring System has been designed around 2.4GHz WiFi (IEEE 802.11b/g/n) technology, allowing you to use your existing WiFi infrastructure without the need for a gateway or hub device.
The Diligence 600 WiFi Monitoring System devices will turn the radio signal off between WiFi transmissions. The sensors do not offer any kind of web page and will not respond to any request on any port other than required by essential network services e.g., DHCP.
The Diligence 600 WiFi Monitoring System devices will turn the radio signal off between WiFi transmissions and will not respond to communication.

Powerful Data Storage and Management Platform
The Diligence Cloud is our most advanced data storage and management platform yet! It offers users a quick and dynamic way to access and drill-down into the data from any device that is being monitored.
The Diligence Cloud Dashboard View delivers a concise overview of your estate of devices, to help you resolve issues more quickly, saving products, time and money.
The Diligence Cloud provides secure, multi-user access to data records and audit trails, from any web-browser enabled device. It is fully scalable to meet the demands of monitoring multiple devices across multiple sites, in line with your monitoring, data logging and compliance requirements.
Technical Specifications
Integral Temperature Sensor Specifications: | |
Sensor Type | Thermistor |
Scales | °C and °F |
Temperature Measurement Range | -18°C to +55°C (-0.4°F to +131°F) - See Note 1 |
Accuracy 0°C to +55°C (-32°F to +131°F) | <±0.3°C (±0.6°F) - See Note 2 |
Accuracy (full range) | ±0.5°C (±0.9°F) - See Note 2 |
Temperature Resolution | 0.1°C (0.2°F) |
External Probes Specifications: | |
Number of External Channels | 4 |
Sensor Type | Thermistor |
Connector | 6-Pin Lumberg |
Scales | °C and °F |
Temperature Measurement Range | -40°C to +125°C (-40°F to +257°F) |
System Accuracy 0°C to +70°C (-32°F to +158°F) - including Probe | <±0.3°C (±0.6°F) - See Note 2 |
System Accuracy -25°C to 100°C (13°F to +212°F) - including Probe | ±0.5°C (±0.9°F) - See Note 2 |
System Accuracy (Full Range) - including Probe | ±1°C (±1.8°F) |
Temperature Resolution | 0.1°C (0.2°F) |
Common Specifications (All Models): | |
Hi Hi/Lo Lo Alarm - All Channels exlcuding Door Switch | Hi Hi and Lo Lo Alarms with Alarm Delay and fully selectable Alarms |
Alarm Delay 0-60 minutes - All Channels excluding Door Switch | Delay is programmable for either H H or Hi Hi Alarms or both independently |
Door Switch (Optional) | Optional accessory RF521 or RF522 |
Door Sensor Resolution | 5 seconds |
Door Switch Alarms | Door Switch Alarms Continuous and Average (up to 60 minutes programmable) |
Ambient Operating Temperature Range | -18 to +55°C (-0.4°F to 131°F) - 10-90% RH - Non-Condensing - See Note 1 |
Storage Temperature | -18 to +55°C (-0.4°F to 131°F) - See Note 1 |
Wireless Frequency | 2.4GHz WiFi (IEEE 802.11b/g/n) |
Wireless Security | WPA2 Pre-Shared Key - See Note 3 |
Radio Range | Typically 20 metres indoors |
Clock Accuracy | 20ppm (1 minute/month) at +25°C (+77°F) |
Logging Memory | 140000 Max records - Depends on number of active channels |
Log Rate | Programmable between 1 minute and 60 minutes |
Channel Monitoring Rate | 1 Minute |
Wireless Radio Rate | Programmable between 5 Minutes to 24 Hours - See Note 5 |
Alarm/Active LEDs (Front) | RED - ALARM / GREEN - External Power |
Status LEDs (Side) | RED - WiFi Active / YELLOW - Communications Active / GREEN - Mains Power Connected |
Case Material | Over Moulded food safe clear Polycarbonate with BioCote® Antimicrobial Protection |
Environmental Protection | Case enclosure designed to meet IP65 BS EN 60529 |
Battery Type | 4 x AA Alkaline or Energizer MAX Lithium - See Note 4 |
Battery Life | Up to 1 year |
Dimensions | Length 110mm, Height 100mm, Depth 45mm |
Weight | 300g |
Mains PSU (Optional) | Optional Mains PSU Part No RF520 (100-240VAC 0.3A 50/60Hz) |
Maximum Probe Lead Length | Not to exceed 30m |
Notes:
- Temperature and Storage range with Energizer Lithium L91 Cells is expanded to -30 to +60°C (-22°F to +140°F)
- When used with a Comark Probe
- Other WiFi Security Options will be provided by Firmware Update
- Use Energizer MAX L91 for improved battery life in all applications but especially recommended for use in low temperature applications.
- The WiFi Rate should be set for 4 hours or greater for best battery life. This will not affect Alarm Notifications.
Downloads
- Diligence 600 WiFi Monitoring System
- Wireless Monitoring for the Healthcare Industry
- Wireless Monitoring for the Food Industry
- Diligence Cloud Data Management Platform
- Diligence Cloud Security Overview
- Quick Start Guide - Diligence 600
- Diligence 600 Transmitter Reference Manual
Product Video