- New
- Sale
- Temperature
- Humidity
- Pressure
- Light Intensity & Motion
- Air Quality
- Flow
- Modbus | Wireless Modbus
- Room controller
- EtherCAT P
- Accessory
Description
HYGRASGARD® KFTF - Modbus/ W-Modbus - T3
Calibratable duct humidity and temperature sensor HYGRASGARD®
KFTF - Modbus - T3 (± 2.0%) or KFTF - 20 - Modbus - T3 (± 1.8%), with Modbus connection,
in an impact-resistant plastic housing with quick-locking screws, optionally with/ without
display, with a plastic sinter filter (exchangeable), incl. mounting flange, to exactly detect
the relative humidity (0…100% RH) and the temperature (–35...+80 °C) and to detect
various parameters in humidity measurement. International system of units SI (default)
can be switched to Imperial (via Modbus).
The duct sensor is applied in a non-aggressive, dust-free environment and is suitable for installation in ceilings, ducts and devices. It is used in the refrigeration, air conditioning and clean room technology, engineering rooms, hotels and conference facilities.
A long-term stable, digital humidity and temperature sensor guarantee exact measurement results. These measurands are used to internally calculate the following parameters that can be retrieved via Modbus: relative humidity, absolute humidity, mixture ratio, dew point, enthalpy (ignoring atmospheric air pressure) and ambient temperature.
The duct sensor is applied in a non-aggressive, dust-free environment and is suitable for installation in ceilings, ducts and devices. It is used in the refrigeration, air conditioning and clean room technology, engineering rooms, hotels and conference facilities.
A long-term stable, digital humidity and temperature sensor guarantee exact measurement results. These measurands are used to internally calculate the following parameters that can be retrieved via Modbus: relative humidity, absolute humidity, mixture ratio, dew point, enthalpy (ignoring atmospheric air pressure) and ambient temperature.
Innovative Modbus sensor with galvanically separated RS485-Modbus-interface, selectable
bus termination resistance, DIP switch for setting the bus parameters and bus address in
curent-free state, internal LEDs for telegram status display, two separate push-in terminals
and large three-line display (illuminated; with customised programming in the 7-segment and
dot-matrix range). The sensor is factory-calibrated; an environmental precision adjustment
by an expert is possible.
Technical details
Voltage supply
24 V AC (± 20 %) and
15…36 V DC
15…36 V DC
Power consumption
< 1.2 W/ 24 V DC; < 1.8 VA/ 24 V AC
Data points
Temperature [°C], relative humidity [% RH],
dew point [°C], absolute humidity [g / m3],
mixture ratio [g / kg], enthalpy [kJ / kg]
dew point [°C], absolute humidity [g / m3],
mixture ratio [g / kg], enthalpy [kJ / kg]
Sensor
digital humidity sensor
with integrated temperature sensor,
low hysteresis, high long-term stability
with integrated temperature sensor,
low hysteresis, high long-term stability
Sensor protection
plastic sinter filter, Ø 16 mm, L = 35 mm, exchangeable
(optional metal sinter filter, Ø 16 mm, L = 32 mm)
(optional metal sinter filter, Ø 16 mm, L = 32 mm)
Measuring range
0...100 % RH (humidity)
-35...+80 °C (temperature)
-35...+80 °C (temperature)
Measuring ranges
0...100 % RH
–35...+80 °C
–35...+80 °C
Accuracy
typically ± 0.2 K at +25 °C
Zero point offset
± 10 % RH (humidity)
± 5 °C (temperature)
± 5 °C (temperature)
Ambient temperature
–30...+70 °C
Medium
clean air and
non-aggressive, non-combustible gases
non-aggressive, non-combustible gases
Bus protocol
Modbus (RTU mode),
address range 0...247 selectable
address range 0...247 selectable
Signal filtering
4 s / 32 s
Process connection
by mounting flange, plastic
(included in the scope of delivery)
(included in the scope of delivery)
Protective tube
PLEUROFORM, material polyamide (PA6), with torsion protection,
Ø 20 mm, NL = 235 mm (optionally 100 mm), vmax = 30 m/s (air)
(option on request in stainless steel V2A (1.4301), Ø 16mm)
Ø 20 mm, NL = 235 mm (optionally 100 mm), vmax = 30 m/s (air)
(option on request in stainless steel V2A (1.4301), Ø 16mm)
Electrical connection
0.2 - 1.5 mm², via push-in terminal
Cable connection
cable gland, plastic
(M 20 x 1.5; with strain relief, exchangeable,
inner diameter 8 - 13 mm) or
M12 connector according to DIN EN 61076-2-101
(optional on request)
(M 20 x 1.5; with strain relief, exchangeable,
inner diameter 8 - 13 mm) or
M12 connector according to DIN EN 61076-2-101
(optional on request)
Long-term stability
± 1 % per year
Permissible air humidity
< 95 % RH, non-precipitating air
Protection class
III (according to EN 60 730)
Protection type
IP 65 (according to EN 60 529)*
Protection type housing
IP 65