- New
- Sale
- Temperature
- Humidity
- Pressure
- Light Intensity & Motion
- Air Quality
- Flow
- Modbus | Wireless Modbus
- Room controller
- EtherCAT P
- Accessory
Description
Showcase humidity and temperature sensor
HYGRASGARD® VFTF - Modbus - T3
Calibratable display cases humidity and temperature sensor HYGRASGARD®
VFTF - Modbus - T3, with Modbus connection, in an impact-resistant plastic housing with
quick-locking screws, optionally with/ without display, cable sensor with a flat stainless
steel probe (pluggable), 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 display cases sensor is applied in a non-aggressive, dust-free environment and is specially suitable for installation in ceilings, walls, display cases or showcases. It is used in museums, galleries, cinemas, lecture halls or laboratories.
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 display cases sensor is applied in a non-aggressive, dust-free environment and is specially suitable for installation in ceilings, walls, display cases or showcases. It is used in museums, galleries, cinemas, lecture halls or laboratories.
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 [°F], relative humidity [% RH],
dew point [°F], absolute humidity [gr/ft³],
mixture ratio [gr/lb], enthalpy [Btu/lb]
dew point [°F], absolute humidity [gr/ft³],
mixture ratio [gr/lb], enthalpy [Btu/lb]
Measuring accuracy
typically ± 0.4 °F at +77 °F
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
probe made of stainless steel, V4A (1.4571), pluggable;
sensor head Ø = 0.67 in, H = approx. 0.1 in;
protective sleeve Ø = 0.4 in, NL = approx. 1 in, M10 x 1.0;
with plastic plug connector Ø = approx. 0.4 in,
NL = approx. 1 in,
sensor head Ø = 0.67 in, H = approx. 0.1 in;
protective sleeve Ø = 0.4 in, NL = approx. 1 in, M10 x 1.0;
with plastic plug connector Ø = approx. 0.4 in,
NL = approx. 1 in,
Measuring range
0...100 % RH (humidity)
-31...+176 °F (temperature)
-31...+176 °F (temperature)
Accuracy, pressure
typical ± 2.0 % (20…80 % RH); at + 77 °F, otherwise ± 3.0 %
Zero point offset
± 10 % RH (humidity)
± 9 °F (temperature)
± 9 °F (temperature)
Ambient temperature
-22...+158 °F
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
Electrical connection
AWG 24 - 16, via push-in terminal
Cable connection
cable gland, plastic
(M 20 x 1.5; with strain relief, exchangeable,
inner diameter 0,3 - 0,5 in) or
M12 connector according to DIN EN 61076-2-101
(optional on request)
(M 20 x 1.5; with strain relief, exchangeable,
inner diameter 0,3 - 0,5 in) or
M12 connector according to DIN EN 61076-2-101
(optional on request)
Cable gland
2x M 20 x 1.5; with strain relief, replaceable,
inner diameter 0.3 - 0.5 in
inner diameter 0.3 - 0.5 in
sensor cable
PVC, LiYY, 4 x 26 AWG,
KL = approx. 6.5 ft
KL = approx. 6.5 ft
Mounting (sensor)
cut-out Ø = 0.43 - 0.59 in, IL = approx. 2 in,
lock nut for fixing is included in the scope of delivery.
lock nut for fixing is included in the scope of delivery.
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)*