Senseca

HD2817T Temperature and Humidity Transmitter

Temperature and humidity transmitter with graphic display for industrial and HVAC monitoring.

Pt100 temperature -50…+200 °C and humidity 0…100 %RH, with calculated dew point, wet bulb temperature, absolute humidity and mixing ratio
Backlit graphic LCD showing up to three values or trends, with built-in data logging (9000 samples)
RS232/RS485 serial ports and 3 analog outputs (4…20 mA, 0…20 mA, 0…10 Vdc or 2…10 Vdc), with optional relays

Quantity

Overview

The HD2817T is a smart environmental transmitter for demanding industrial and HVAC applications. It combines precise measurement, easy configuration and advanced data logging, and works as a transmitter, indicator and ON/OFF regulator for real-time monitoring and control of temperature and humidity. It measures temperature and relative humidity while calculating dew point, wet bulb temperature, absolute humidity and mixing ratio, and shows up to three values or trend graphs on its backlit graphic LCD. Each probe is factory-calibrated and can be replaced on site without stopping operations.

Typical applications

Versatile configurations and display options suit a range of installations.

Manufacturing environments
Cleanrooms
Ducts
Compressed air lines (with the S.TC2.480.2 and S.481.2 probes, for measuring humidity of the air in pipes)
HVAC monitoring

Key Features

Smart measurement, display and logging in one instrument.

Simultaneous measurement of temperature and relative humidity, with calculation of dew point, wet bulb temperature, absolute humidity and mixing ratio
Backlit graphic LCD showing up to three values or trend graphs
Interchangeable probes that can be swapped on site without stopping operations
SICRAM2 module in each probe stores its calibration data for seamless replacement
Integrated data logging: 9000 samples in up to 256 sessions, intervals from 1 s to 4 min, with lithium battery backup for the clock
Current and voltage outputs (3 analog outputs), RS232/RS485 serial ports and optional control/alarm relays
Integrated horizontal (S.TO), vertical (S.TV) or remote (S.TC) probe configurations, with remote probes in stainless steel or PBT
Power supply options: 24 Vac/dc or 90…240 Vac
DeltaLog12 software supplied, downloadable from the website

Benefits

Built for continuous, reliable monitoring.

Interchangeable probes: replace the probe without interrupting the process
Real-time display: view up to three values or trends on a backlit LCD
Accurate and pre-calibrated: each probe is factory-calibrated and stores its data in an internal memory module
Built-in data logging: records measurements with configurable intervals and backup timekeeping
Flexible integration: multiple outputs (current, voltage, RS232/RS485) and optional relays for control functions

Specifications

INPUTS
Temperature sensor	Pt100
Temperature measuring range	-50…+200 °C
Humidity measuring range	0…100 %RH
Dew point TD	-50…+100 °C
Absolute humidity	0…600 g/m³
Mixing ratio	0…2000 g/kg of dry air
Wet bulb temperature	-50…+100 °C
Accuracy of the measured quantities (@24 Vac and 20 °C)	Pt100 temperature: ±0.25 °C %RH: ±1.5 %RH (0…90 %RH), ±2.0 %RH for remaining range, for T=15…35 °C; ±(1.5 + 1.5% of the measured value) %RH for remaining temperature range
Accuracy of the calculated quantities	Dew point @T=20 °C: ±2 °C DP (-40…-20 °C DP), ±1.5 °C DP (-20…0 °C DP), ±1 °C DP (0…20 °C DP)
Response time	3 min with filter (at 20 °C and 0.5 m/s)
S.TC2.480.2 and S.481.2 probes (humidity of the air in pipes)	Same specifications, with these exceptions: Temperature measuring range: -40…+60 °C Dew point measuring range: -40…+60 °C Dew point accuracy @T=20 °C: ±2 °C DP (-40…0 °C DP), ±1 °C DP (0…+20 °C DP) Working temperature: -40…+80 °C Working pressure: 0…16 bar (S.TC2.480.2), -1…8 bar (S.481.2)

OUTPUTS
Communications	Type: RS232C and RS485 Multidrop Baud rate: 9600 baud; 57600 baud non-permanent
Physical quantities	Measured: Temperature, Relative Humidity Calculated: Absolute humidity, mixing ratio, dew point, wet bulb temperature
Analog outputs	Number: 3 (HD2817T…) Output types: 4…20 mA; 0…20 mA; 0…10 Vdc; 2…10 Vdc Load resistance: current output 500 Ω max; voltage output 100 kΩ min Resolution: 16 bit Accuracy: ±0.05% f.s. @20 °C
Relay	Operating relay: 2 x SPDT, 3 A / 250 Vac resistive load Alarm relay: 1 x SPST normally open, 3 A / 250 Vac resistive load

INSTRUMENT SPECIFICATIONS
Power supply	24 Vac/dc ±10% or 90…240 Vac depending on model, 50…60 Hz Average consumption 3 W
Datalogger	Storage capacity: 9000 samples in max. 256 sessions Type of memory: Circular memory Stored parameters: all the parameters and the status of the outputs Storage interval: 1, 2, 5, 10, 20, 60 s, 2 and 4 min
Internal clock	Real time with lithium backup battery Accuracy ±1 min/month
Operating conditions	Temperature: -20…+60 °C Relative humidity: 0…90 %RH non-condensing Static operating pressure of the sensors: max. 12 bar
Storage temperature	-30…+80 °C
Weight	600 g
Material	ABS
Protection degree	IP65
PC connection	Multistandard RS232C/RS485 port and one RS232C auxiliary serial port. The auxiliary RS232C port can be connected to a USB PC port via the CP27 cable with integrated USB/RS232C converter.

ORDERING CODES
HD2817 ... D	Probes compatibility: T = model for vertical probe or probe with cable; TO = model for horizontal probe Relay: 0 = without relay; R = with relay Power supply: blank = 90…240 Vac; /24 = 24 Vac/dc D = graphic LCD display
Vertical probe	S.TV: stem length 130 mm, AISI304, P8 filter
Horizontal probes	S.TO1: stem length 135 mm, AISI304, P7 filter S.TO2: stem length 335 mm, AISI304, P7 filter
Probes with cable for humidity and dew point in compressed air systems or pipes	S.TC2.480.2: cable length 2 m, 1/4" quick coupling Italian standard, AISI 304 measuring chamber S.481.2: cable length 2 m, G ½" threading, 15 µ sintered AISI 316 stainless steel filter
Probes with cable (S.TC)	Probe length: 1 = 135 mm, 2 = 335 mm Stem material: blank = AISI 304, P7 filter, max 150 °C; HT = AISI 304, P6 filter, max 170 °C; P = PBT technopolymer Cable length: 2 = 2 m, 5 = 5 m, 10 = 10 m
Note	All models are supplied with DeltaLog12 software downloadable from the website. Model, power supply and type of probe have to be specified when placing the order.