W&T 97702 Wi-Fi temperature logger, 2× Pt100, MQTT
W&T 97702 Wi-Fi temperature logger, 2× Pt100, MQTT
The W&T 97702 measures temperature via two independent Pt100 inputs and transmits the values via 2.4 GHz Wi-Fi. It has a web interface and supports MQTT, HTTP(S) queries, TCP sockets and notifications via ntfy.sh. More
Code: 97702
The W&T 97702 measures temperature via two independent Pt100 inputs and transmits the values via 2.4 GHz Wi-Fi. It has a web interface and supports MQTT, HTTP(S) queries, TCP sockets and notifications via ntfy.sh. More
Code: 97702
Wi-Fi temperature logger with two Pt100 inputs
Price on request
The W&T 97702 measures temperature via two independent Pt100 inputs and transmits the values via 2.4 GHz Wi-Fi. It has a web interface and supports MQTT, HTTP(S) queries, TCP sockets and notifications via ntfy.sh.
Do you need to select or order the W&T 97702?
Please send us the required quantity and a description of the wiring configuration. We will confirm the price and availability in our quotation.
Usage
It is used for remote temperature monitoring wherever a suitable wireless network is available. The device can operate as an access point for configuration or as a client on an existing WLAN.
Technical specifications for the W&T 97702
| Temperature sensor | 2 Pt100 measurement inputs W&T probe cable: 2 m, can be extended depending on the connection Probe protection rating: IP67 |
|---|---|
| Temperature input connection | 8-pin terminal block Conductor cross-sectional area 0.2–1.3 mm² Length of stripped section: 6–8 mm |
| Network interface | WLAN 802.11 b/g/n 2.4 GHz Channels: 13 Mid-frequency range (channels): 2412 to 2484 MHz Max. transmit power: 20 dBm |
| Supply voltage | 12 V to 24 V DC (+/- 10 %) via a screw terminal |
| Power connection | Screw terminal, pitch 5.08 mm |
| Current consumption | typ. 40 mA at 24 V DC, typ. 70 mA at 12 V |
| Signalling | 1 Power LED 1× error LED |
| Sensor | 2× Pt100 connections: two-wire, three-wire or four-wire |
| Measuring range | W&T sensor: -50 °C to 180 °C Pt100 input: -200 °C to 650 °C |
| Resolution | 1/10 °C |
| Maximum error of the unit of measurement | ±0.3 °C, ±0.2 % |
| Maximum error of a Class A Pt100 sensor | ±0.15 °C, ±0.2 % |
| Measurement period | 1/second |
| Save interval | 5 s, 15 s, 30 s, 1 min, 5 min, 15 min, 30 min, 60 min |
| History capacity (4 MB memory) | min. 6 weeks, max. 10 years |
| Housing and mounting | Compact plastic housing for DIN rail mounting 105 × 22 × 75 mm (length × width × height) |
| Degree of protection | IP20 |
| Weight | approx. 200 g |
| Ambient temperature | Storage: -40 to +70 °C Operating temperature with spacing between devices: 0 to +60 °C Operating temperature when installed side by side without spacing: 0 to +50 °C |
| Permissible relative humidity | 0 to 95 per cent RH, non-condensing |
| Operating ambient temperature | 0 to +60 °C |
| Contents of the delivery | 1x Wi-Fi temperature logger, 2x Pt100 2 Pt100 sensors, 2 m 1× quick start guide |
Wireless communication and measurement history
- The measurement inputs cover a range from -200 to +650 °C. The supplied W&T sensors have a range of -50 to +180 °C. The set includes a pair of Pt100 sensors with a 2 m cable.
- Two-wire, three-wire or four-wire Pt100 connections are supported. Measurements are updated once per second and the resolution is 0.1 °C.
- The Wi-Fi interface operates in the 2.4 GHz band in accordance with 802.11 b/g/n. Configure the network login method and MQTT broker availability according to the specific installation.
- The internal data logger stores historical data for between 6 weeks and 10 years, depending on the interval. You can choose between 5, 15 or 30 seconds, and 1, 5, 15, 30 or 60 minutes.
Commissioning and accessories
Connect the Pt100 sensors and a 12–24 V DC power supply. In access point mode, carry out the basic settings and then, if necessary, switch to WLAN client mode. Verify network availability, reception of MQTT messages and behaviour in the event of a connection failure.
Contents of the delivery
- 1x Wi-Fi temperature logger, 2x Pt100
- 2 Pt100 sensors, 2 m
- 1× quick start guide
Frequently Asked Questions
Does it support 5 GHz Wi-Fi devices?
The manufacturer specifies Wi-Fi 802.11 b/g/n in the 2.4 GHz band for this model.
Is the full measurement range available with the probe supplied?
No. The input range is -200 to +650 °C, but the supplied W&T probe is rated for -50 to +180 °C.
How is local history preserved?
The internal data logger uses a set recording interval, and its capacity corresponds to between 6 weeks and 10 years of data. The length of the history depends on the interval.
Why order from FOXON?
Before placing an order, we will check the current availability of the part and confirm the estimated delivery date. We will assist you in selecting the equipment and necessary accessories based on the wiring configuration and required communication. We will confirm the warranty terms and the scope of any diagnostics or repairs for the specific quotation.
Documentation and technical consultancy
Technical data and documentation for W&T 97702
Manuals, firmware and tools for this model can also be found in the Downloads tab. For service enquiries, please use sale and repair of FOXON industrial parts.
Do you need to select or order the W&T 97702?
Please send us the required quantity and a description of the wiring configuration. We will confirm the price and availability in our quotation.
Diagrams and illustrations
Technical specifications of the W&T 97702
| Temperature sensor | 2 Pt100 measurement inputs W&T probe cable: 2 m, can be extended depending on the connection Probe protection rating: IP67 |
|---|---|
| Temperature input connection | 8-pin terminal block Conductor cross-sectional area 0.2–1.3 mm² Length of stripped section: 6–8 mm |
| Network interface | WLAN 802.11 b/g/n 2.4 GHz Channels: 13 Mid-frequency range (channels): 2412 to 2484 MHz Max. transmit power: 20 dBm |
| Supply voltage | 12 V to 24 V DC (+/- 10 %) via a screw terminal |
| Power connection | Screw terminal, pitch 5.08 mm |
| Current consumption | typ. 40 mA at 24 V DC, typ. 70 mA at 12 V |
| Signalling | 1 Power LED 1× error LED |
| Sensor | 2× Pt100 connections: two-wire, three-wire or four-wire |
| Measuring range | W&T sensor: -50 °C to 180 °C Pt100 input: -200 °C to 650 °C |
| Resolution | 1/10 °C |
| Maximum error of the unit of measurement | ±0.3 °C, ±0.2 % |
| Maximum error of a Class A Pt100 sensor | ±0.15 °C, ±0.2 % |
| Measurement period | 1/second |
| Save interval | 5 s, 15 s, 30 s, 1 min, 5 min, 15 min, 30 min, 60 min |
| History capacity (4 MB memory) | min. 6 weeks, max. 10 years |
| Housing and mounting | Compact plastic housing for DIN rail mounting 105 × 22 × 75 mm (length × width × height) |
| Degree of protection | IP20 |
| Weight | approx. 200 g |
| Ambient temperature | Storage: -40 to +70 °C Operating temperature with spacing between devices: 0 to +60 °C Operating temperature when installed side by side without spacing: 0 to +50 °C |
| Permissible relative humidity | 0 to 95 per cent RH, non-condensing |
| Operating ambient temperature | 0 to +60 °C |
| Contents of the delivery | 1x Wi-Fi temperature logger, 2x Pt100 2 Pt100 sensors, 2 m 1× quick start guide |