Milesight EM500-PT100

Compatibility

Compatible with EpiSensor Edge over LoRaWAN.

Register it on your LoRaWAN network server with its DevEUI and keys. Edge, on the Gateway, reads its decoded uplinks from that server.

Edge reads 7 values from it, listed under Interface.

Connect it with

• 
  Gateway ZGW-20
  From €899 ex VAT Configure Gateway

Specifications

The EM500-PT100 is a battery-powered LoRaWAN transmitter with a PT100 resistance thermometer on a 1.5 m cable, wired as a 3-wire connection. It reports one temperature at 0.1 °C resolution. It is a contact probe, and Milesight lists pipes, ovens, industrial machines, boilers and chimneys among its uses.¹

Power

Battery. One replaceable 19000 mAh ER34615 Li-SOCl₂ cell. Milesight quotes 10 years at a 10-minute interval and 25 °C (a laboratory figure). Alkaline cells are not supported.¹

Sensor

PT100, 3-wire connection, contact probe¹

Range by probe

T050: -200 to 50 °C; T200: -50 to 200 °C; T500: -50 to 500 °C; T800: -50 to 800 °C¹

Accuracy, T050

Class B, typical ±0.5 °C (-40 to 40 °C), ±1 °C (-140 to 50 °C), ±1.5 °C (-200 to -140 °C)¹

Accuracy, T200

Class A, typical ±0.6 °C (-50 to 200 °C)¹

Accuracy, T500

Class A, typical ±0.5 °C (-50 to 170 °C), ±1.2 °C (170 to 500 °C)¹

Accuracy, T800

Class A, typical ±0.5 °C (-50 to 170 °C), ±1 °C (170 to 420 °C), ±2 °C (420 to 800 °C)¹

Probe

304 stainless Ø4 × 30 mm (T050, T200, T500); 316 stainless Ø5 × 50 mm (T800)¹

Probe protection

IP67 on the T200; IP30 on the T050, T500 and T800¹

Cable

1.5 m; Teflon on the T050 and T200, fibreglass on the T500 and T800¹

Resolution

0.1 °C¹

Transmitter operating range

-30 to 70 °C, 0 to 100 % RH non-condensing, IP67¹

LoRaWAN

Class A, OTAA or ABP, versions 1.0.2 and 1.0.3²

Frequency plans

CN470, IN865, RU864, EU868, US915, AU915, KR920, AS923-1 to AS923-4¹

Local storage

1,000 records, retransmission and time-range retrieval¹

Dimensions

105.4 × 71 × 69.5 mm, 362.7 g with battery, bracket and probe¹

Mounting

Wall, pole or DIN rail¹

Approvals

CE, FCC, ISED, ICASA, Telec, RoHS¹

Where it is used

• Hot-water flow and return temperatures on calorifiers and circulation loops, where the T200 probe covers the range and is IP67.

  Legionella temperature monitoring

• Flue, boiler and chiller water temperatures read beside the plant's energy input.

  Boiler performance monitoring

• Blast freezers, cryogenic stores and liquid nitrogen lines down to -200 °C with the T050 probe.

  Cold room and cold store temperature monitoring

• Ovens, kilns and hot process lines up to 800 °C with the T800 probe.

Interface

Device class

Class A²

Regional plans

EU868, US915, AU915, AS923, KR920, IN865, RU864, CN470

Activation

OTAA or ABP

LoRaWAN version

1.0.2 or 1.0.3

Default uplink interval

10 minutes (1 to 1,080 minutes)

Ports

Decoded fields

Readings and settings, with units and ranges where Milesight publishes them. R readable, W writable only.²

Each uplink is a run of channel, type and value fields, with multi-byte values in little-endian order. Temperature is channel 03, type 67: a signed 16-bit value in tenths of a degree Celsius, whatever unit the ToolBox app displays.^2, 3

A raw value of FFFF means the device could not read the probe, and FFFD means the reading was outside the measuring range. Milesight's reference decoder does not flag either, so they decode as -0.1 and -0.3 °C; treat both as faults in Edge.^2, 3

Battery level is sent on joining and every 24 hours, not with every temperature uplink.²

Setup

1. Register it on the network server

   Add the EM500-PT100 as a Class A device using OTAA, with the device EUI from its label, the join EUI 24E124C0002A0001 and its application key.²

2. Power it on and match the frequency plan

   Read the device over NFC in the Milesight ToolBox app, or over USB-C with the ToolBox software, and power it on. Set the frequency plan to match the network and write the settings.²

3. Set the clock

   Sync the time from the ToolBox app, or set the device to LoRaWAN 1.0.3 so it asks the network server with DeviceTimeReq. Stored readings carry this clock's timestamps.²

4. Mount the transmitter and fit the probe

   Fix the transmitter to a wall, a pole or a DIN rail, away from metal objects. Put the probe in contact with what it measures, in a thermowell or clamped to the pipe, with the cable inside its temperature rating.²

5. Check one reading

   Compare the first decoded temperature with a reference thermometer at the same point. A value of FFFF or FFFD in the raw payload means a probe or range fault, not a temperature. Then connect it to Edge.

Common questions

Is it a 2-wire or 3-wire PT100?

3-wire. The probe connects to the internal terminal block on a white ground wire and two red wires, which Milesight gives as the reason for its precision.^1, 2

How does it report a broken probe?

A failed read is sent as FFFF and an out-of-range reading as FFFD, instead of a temperature.²

How long does the battery last?

Milesight quotes 10 years at a 10-minute interval and 25 °C on the 19000 mAh ER34615 cell, as a laboratory figure. Retransmission adds uplinks and shortens it.^1, 2