PFT28


PFT28


can be shipped within ca. 14 days

287.00
Price without VAT or delivery
Delivery weight: 500 g


  • Measuring temperature and relative humidity with a „single-chip“-sensor
  • Calculation and display of dew point temperature, enthalpy, wet bulb temperature and absolute humidity
  • Digital transmission from sensor to the evaluation electronics
  • Fast response time
  • Exchange ability of sensor without recalibration
  • Alphanumeric LCD-indicator for: temperature, relative humidity, dew point temperature, absolute humidity, wet bulb temperature and enthalpy
  • Analogue outputs 0/2...10 V or 0/4...20 mA
  • Supply voltage 15...30 Vdc or 24 Vac
  • Operational use humidity 0...100 % (transient condensation possible)
  • Operational use temperature -30...+50 °C
  • Plastic housing, protection class IP 54; UL 94 HB

 

The transmitter PFT28 converts the measured variables temperature and relative humidity into the measured variables: dew point temperature, absolute humidity, wet bulb temperature and enthalpy. Output 1 supplies the temperature signal while Output 2 can be assigned to one of four other measured variables. The second measured variable is selected by a two-pole DIP switch. Measured variable, measured value and unit are displayed on a two-line alphanumeric display.

 

Two PFT28 versions are available: A room sensor for wall mounting and a duct sensor for installation in a ventilation duct. In both versions, the sensor tube is mounted directly to the chassis. With a jumper, the output signals can be switched from 0/2...10 V to 0/4...20 mA. The device is powered with 15...30 Vdc or 24 Vac.

 

Specifications


Sensor: single-Chip sensor for relative humidity and temperature with digital signal converting and chip calibration memory.

Relative Humidity
Resolution: 12 Bit
Characteristic: linear (digital linearization)
Response time: approx. 4 seconds (63% time, slightly moved air)    
Long term stability: typical < 1 % RH per year

Standard sensor    
Reproducibility: ± 0,1 % RH
Tolerance: ± 3,5 % RH at 30...70 % RH / ± 5,0 % RH at 00...29 % RH / ± 5,0 % RH at 71...100 % RH

Sensor with narrowed tolerance
Reproducibility: ± 0,1 % RH
Tolerance: ± 2,0 % RH at 10...90 % RH / ± 4,0 % RH at 00...09% RH / ± 4,0 % RH at 91...100 % RH

Temperature
Resolution: 14 Bit
Characteristic:    linear
Response time: approx. 20 seconds

Standard sensor
Reproducibility: ± 0,1 % °C
Tolerance: ± 0,5 °C at 25 °C / ± 2,0 °C at -40 °C / ± 3,0 °C at +120 °C

Sensor with narrowed tolerance
Reproducibility: ± 0,1 % °C
Tolerance: ± 0,3 °C at 25 °C / ± 1,5 °C at -40 °C / ± 2,0 °C at +120 °C

Housing: Ultra mid with folding ABS cover, directly mounted sensor tube

Protection class: IP 54 according EN 60529; UL 94 HB
Dimensions: 95 x 70 x 54 [mm] (WxHxD)
Storage temperature: -25...+60 °C
Weight: approx. 300 g

Duct sensor: sensor tube of stainless steel, 11 mm Ø on the backside
Montage: wall-mounted
Operation temperature range:

sensor: -40...+120 °C
electronic: -10...+50 °C


Room sensor: sensor tube of stainless steel, 11 mm Ø on the frontside
Montage: wall-mounted
Operation temperature range:

Sensor: -40...+120 °C
Electronic:    -10...+50 °C

Supply voltage: 15...30 Vdc; 24 Vac (±15%)
 
Power consumption: approx. 14 mA @ 24 Vdc at 0...10 V output
Display: two-line alphanumeric LCD display, 2x16 digit
Outputs: 0/2...10 V or 0/4...20 mA switchable via DIP-switch and jumper
Output 1: temperature
Output 2: one of four other measured variables selectable by a two-pole DIP-switch

Measuring range

temperature: TH= -30...+50 °C
relative humidity: RH= 0...100 %
dew point temperature: td  = -30...+50 °C
wet bulb temperature: tf   = -30...+50 °C            
enthalpy: E = 0...200 kJ/kg

Special measuring range

Absolute humidity: a.F. = 0...50 g/kg    

EMC: tested according EN 61000-6-2, EN 61000-6-3, CE mark

Additional product information

data sheet Download

Accessories

Product Note Status Price
Mounting flange MF-M90
12.00 *
* Prices without VAT or delivery
Display accessory details

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