10
Quality product for HVAC sector, accuracy ± 2 % or ± 3 %
Calibratable duct humidity ⁄ temperature sensors
HYGRASGARD®KFF ⁄ KFTF
(± 3 % ) or
KFF - 20 ⁄ KFTF - 20
(± 2 %), with plastic sinter filter
(optional metal sinter filter), terminal box enclosure made of impact-resistant plastic, enclosure cover with quick-locking screws,
with ⁄ without
optional display.
Calibratable duct humidity ⁄ temperature sensors
HYGRASGARD
®
KFF - SD ⁄ KFTF - SD
(± 3 % ), with plastic sinter filter (optional metal sinter filter),
terminal box enclosure made of impact-resistant plastic,
enclosure with snap-on lid
.
It measures the relative humidity and ⁄ or the temperature of the air and converts the measurands into a standard signal of 0 -10 V or 4...20 mA. It
has four switchable temperature ranges and is applied in non-aggressive dust-free atmospheres in refrigeration, air conditioning, ventilation and
clean room technology. Relative humidity (in % r. H.) is the quotient of water vapour partial pressure divided by the saturation vapour pressure at the
respective gas temperature. These measuring transducers are designed for exact detection of humidity. A digital long-term stable sensor is used as
measuring element for humidity measurement. Fine adjustment by the user is possible.
TECHNICAL DATA
Power supply: 24 V AC (± 20 %); 15...36 V DC for U variant
15...36 V DC for I variant,
depending on working resistance, residual ripple stabilised ± 0.3 V
Working resistance: Ra(ohm) = (Ub-14 V) ⁄ 0.02 A for I variant
Load resistance: RL> 5 kOhm for U variant
Power consumption: < 1.1 VA ⁄ 24 V DC ; < 2.2 VA ⁄ 24 V AC
Sensors:
digital humidity sensor 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)
HUMIDITY
Measuring range, humidity: 0...100 % r. H. (output corresponding to 0 -10 V or 4...20 mA)
Permissible air humidity: < 95 % r. H., non-precipitating air
Deviation, humidity:
KFF ⁄ KF TF ⁄ KFF - SD ⁄ KFTF - SD: ± 3 % r. H.
(20...80 %) at +20 °C, otherwise ± 5 % r. H.
KFF - 20 ⁄ KFTF - 20:
± 2 % r. H.
(20...90 %) at +20 °C, otherwise ± 3 % r. H.
Output, humidity: 0 -10 V for U variant
4 … 20 mA for I variant, see load resistance diagram
TEMPERATURE
Measuring range, temperature:
multi-range switching with 4 switchable measuring ranges
(see table)
–35...+35 °C; –35...+75 °C; 0...+50 °C; 0...+80 °C
(output corresponding to 0 -10 V or 4...20 mA)
Ambient temperature: storage –35...+85 °C; operation – 30...+75 °C, non-precipitating
Deviation, temperature: ± 0.2 K at +25 °C
Output, temperature: 0 -10 V or 4 ... 20 mA or Ohm value
Electrical connection: 2-, 3-, or 4-wire connection (see connecting diagram),
0.14 - 1.5mm², via terminal screws on circuit board
Enclosure: plastic, material polyamide, 30 % glass-globe-reinforced,
KFF ⁄ KF TF ⁄ KFF - 20 ⁄ KFTF - 20: with quick-locking screws
(slotted ⁄ Phillips head combination),
KFF - SD ⁄ KFTF - SD: with snap-on lid
colour traffic white (similar to RAL 9016) enclosure cover for display is transparent!
Enclosure dimensions:
KFF - SD ⁄ KFTF - SD:
72 x 64 x 37,8 mm (Tyr 01)
KFF ⁄ KFTF ⁄ KFF - 20 ⁄ KFTF - 20 without display:
72 x 64 x 37.8 mm (Tyr 1)
KFF ⁄ KFTF with display:
72 x 64 x 43.3 mm (Tyr 1)
KFF - 20 ⁄ KFTF - 20 with display:
26 x 90 x 50 mm (Tyr 2)
Cable gland: M 16 x 1.5, including strain relief, exchangeable, max. inner diameter 10.4 mm
Protective tube:
PLEUROFORM
TM, material polyamide (PA6), with torsion protection
Ø 20 mm, NL = 235 mm, vmax = 30 m/s (air)
(on request, optional
stainless steel,
Ø 16 mm)
Process connection: by mounting flange, plastic (included in the scope of delivery)
Long-term stability: ± 1 % per year
Protection class: III (according to EN 60 730)
Protection type:
KFF - SD ⁄ KFTF - SD:
IP 43
(according to EN 60 529) enclosure only!
KFF ⁄ KF TF ⁄ KFF - 20 ⁄ KFTF - 20: IP 65
(according to EN 60 529) enclosure only!
Standards: CE conformity, according to EMC directive 2014 ⁄ 30 ⁄ EU, according to EN 61326-1, according to EN 61326-2-3
Optional:
display with illumination,
for displaying ACTUAL temperature and ⁄ or ACTUAL humidity
KFF ⁄ KFTF
(Tyr 1)
:
two-line, cutout approx. 36 x15 mm (W x H)
KFF - 20 ⁄ KFTF - 20
(Tyr 2)
:
three-line, cutout approx. 70 x 40 mm (W x H)
GHYGRASGARD®
KFF ⁄ KFTF ⁄ KFF - SD ⁄ KFTF - SD (± 3 %), KFF - 20 ⁄ KFTF - 20 (± 2 %)
Rev. 2017 - V23 GB
SD = Rev. 2017 - V10 GB
