Features | RF616 WiFi PT100 Thermocouple Transmitter
- Battery Powered
- Integral Temperature Sensor
- Designed for a single External PT100 Channel
- High Accuracy (Transmitter) +/-0.1°C/0.2°F
- Connects to your Local Wi-Fi Network
- Designed for Easy Self-Installation

Designed to monitor temperature of your critical items with the highest possible level of accuracy
Wide Range
Monitor temperature over a wide range -200°C to +150°C (-328°F to 302°F)
Ultra-Low
Use with one of our PT100 probes to monitor your low and ultra-low temperature storage areas
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° |
External Probe Specifications: | |
Number of External Channels | 1 |
Sensor Type | PT100 (4-Wire) |
Connector | 6-Pin Lumberg |
Scales | °C and °F |
Temperature Measurement Range | -200°C to +150°C (-328°F to +302°F) |
Instrument Accuracy (Full Range) | <±0.1°C (±0.2°F) - See Note 2 |
Temperature Resolution | 0.05°C (0.1°F) |
Common Specifications (All Models Excluding RF612): | |
Hi/Lo Alarm - All Channels excluding Door Switch | H and 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 |
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 Wi-Fi (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 | 140,000 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 - Wi-Fi 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 |
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 Wi-Fi 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 Wi-Fi 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