MST-91Ai

Grand Meyer® MST-91Ai

Wi-Fi weather station MST-91Ai is designed to control cable systems for anti-icing of roofs, open areas, pipelines and tanks, as well as any other cable systems for electric heating.

MST-91AI SPECIFICATIONS
Power supply
~100 - 240V, 50(60) Hz
Power consumption
no more than 5 W
Number of control channels (relay)
1
Load current of control relay contacts
16A/250V
Relay contact type
NO (SPDT)
Number of temperature sensor channels
1
Temperature measuring range
from -40⁰С to +120⁰С
Temperature measurement accuracy
± 1,0⁰С
Number of channels for water and precipitation sensors
channel: - 1 sensor (TS-2)
Number of gradations of measurement levels (sensitivity) of water and precipitation sensors
2 (0-dry, 1-presence of water/precipitation)
WiFi standard
802.11b/g/n
WiFi frequency range
2.4 GHz
Operating temperature range
from -30⁰С to +80⁰С at humidity up to 80%
Cross-section of wires of sensor cables connected to the terminals of the weather station
up to 2.5 mm²
Cross-section of wires of control relay and power supply cables connected to the terminals of the weather station
up to 2.5 mm²
Degree of protection
IP20
Dimensions
86 (H) x 90 (W) x 65 (D) mm
Body color
light gray
Mount type
DIN rail
Internal fuse rating
0.5 A
Weight
155 g
Compatible temperature sensor
Grand Meyer TS-1
Compatible moisture and precipitation sensor
Grand Meyer TS-2
Warranty
3 years
Certified
СЕ, ЕАС

The weather station was produced using dual-core microprocessor technology on the real-time operating system RTOS, which made it possible to build a very reliable snowmelt system.

The use of a number of unique settings and algorithms, our own weather service and the technology of remote sharing of sensors between weather stations made it possible to create a flexible and cost-effective new generation snowmelt system.

The weather station is configured and controlled through the built-in web interface, which ensures its correct and convenient display on devices with different screen resolutions, both on a mobile phone and a computer.

Supported browsers: Chrome, Opera, Firefox, Safari, IE, EDGE. It is also possible to connect the weather station to the Telegram messenger for real-time notification of various events in the management of the weather station (turning on, turning off heating zones, etc.).

The weather station can operate in fully automatic mode via the Internet weather service (without the use of sensors or use weather service data when they are turned off).

The weather station supports the following types of sensors:

Temperature sensor (air, surface)

TS-1​

TS-1 SPECIFICATIONS
Temperature measuring range
from -40⁰С to +120⁰С
Temperature measurement accuracy
± 1.0⁰С
Active sensor element/type
NTC (12 kOhm at +25⁰C)
Sensor dimensions
6 (Dia.) x 30 (L.) mm
Sensor cable length
3 m
Max. sensor cable extension length
100 m
Extension cable
2-wire with a cross section of at least 0.75 mm²
Certified
СЕ, ЕАС

Installation and connection of the sensor Grand Meyer TS-1

Sensor for the presence of melt water and precipitation

ТS-2

WSM-13 SPECIFICATIONS
Power supply
~230V (-15%, +10%), 50Hz
Power consumption
8 - 16 W (in dry condition)
Type
Self-regulating cable
Operating temperature range
-60⁰С to +65⁰С (+85⁰C off)
Number of gradations of levels of precipitation measurements
2 (0-dry, 1-presence of water/precipitation)
Degree of protection
IP67
Sensor cable length
3 м
Max. sensor cable extension length
100 m
Extension cable
3-wire shielded with a cross section of at least 0.75 mm²
Overall dimensions of the active surface of the sensor
11.5 x 500 mm
Certified
СЕ, ЕАС

The sensor is made of a 50 cm piece of self-regulating cable, the heat release of which varies depending on the properties of the environment (temperature, precipitation, melt water and humidity) in which it is located. The current dependence of the sensor, proportional to its heat release, is analyzed by the meteorological station, which, based on the data received, issues a command to turn on / off the heating sections of the heating system.

Installation and connection of the sensor Grand Meyer TS-2

Wiring diagram