GHTU Humidity and Temperature Transducer thumbnail 1

Senseca

GHTU Humidity and Temperature Transducer

Humidity and temperature transducer for wall, duct and open-air use.

Humidity 0.0…100.0 %RH and temperature -40.0…+120.0 °C
4…20 mA standard output (0…1 V or 0…10 V optional), with a 4-digit LCD alternating humidity and temperature
ABS housing, IP65, with min/max memory and adjustable offset and slope

Quantity

Overview

The GHTU is a humidity and temperature transducer built with the latest microprocessor technology. It measures 0.0…100.0 %RH (temperature compensated) and -40.0…+120.0 °C, and comes in wall, wall/duct, duct, cable and open-air versions. It has a 4-digit LCD and standard signal outputs, in an ABS housing (IP65).

Typical applications

Different versions let the GHTU be used in almost all applications.

Wall mounting (GHTU-1R-MP, GHTU-1K-MP)
Duct (channel) mounting (GHTU-1K-MP, GHTU-2K-MP)
Open-air measurement with the heat absorption hat / weather protection shield (GHTU-SHUT-MP)
Wall mounting with a separated sensor tube on a 1 m cable and high-humidity sensor (GHTU-KABEL-MP)

Key Feature

Precise and flexible humidity and temperature measurement with a built-in display.

Temperature compensated humidity measurement, with automatic temperature compensation
4…20 mA standard output; 0…1 V and 0…10 V options, including galvanically isolated versions
4-digit LCD display (approx. 10 mm high) alternating humidity and temperature
Min/max value memory, offset and slope adjustable, output signal scaleable
Optional UNI display: show wet bulb temperature, dew point temperature, enthalpy, atmospheric humidity or absolute humidity instead of the humidity value
Optional high-humidity sensor; optional encapsulated PC board for use where condensation may occur
Fitting lengths of 50, 220, 300, 400 or 500 mm

Benefits

Flexible mounting: wall, duct, separated probe and weather shield versions support room, duct and open-air use
Wide sensor range: measures 0.0…100.0 %RH and sensor temperatures from -40.0…+120.0 °C
Process-ready output: 4-20 mA is standard; 0-1 V and 0-10 V options are available
Protected housing: ABS housing and EN 175301-803/A elbow-type plug are rated IP65
On-site adjustment: min/max memory, offset and slope adjustment, and scalable output support setup

Specifications

SPECIFICATIONS
Humidity measuring range	0.0…100.0 %RH (temperature compensated)
Temperature measuring range	-40.0…+120.0 °C or -40.0…+248 °F
Recommended humidity range	20.0…80.0 %RH (standard) 5.0…95.0 %RH (with option high humidity)
Display options (option UNI)	An alternative display unit can be shown instead of the humidity measuring value, selected via keyboard: Wet bulb temperature: -27.0…+60.0 °C Dewpoint temperature: -40.0…+60.0 °C Enthalpy: -25.0…+999.9 kJ/kg Atmospheric humidity: 0.0…640.0 g/kg Absolute humidity: 0.0…200.0 g/m³
Accuracy (at 25 °C and in recommended range)	Display, humidity: ±2.5 %RH Display, temperature: ±0.4 % of measuring value ±0.2 °C Output signal: humidity ±0.2 % FS, temperature ±0.2 % FS
Temperature compensation	Automatically
Auxiliary energy	12…30 VDC or 18…30 VDC (for output: 0-10 V)
Reverse voltage protection	50 V, permanently
Permissible impedance (at 4-20 mA)	RA [Ω] ≤ (UV [V] - 12 V) / 0.02 A
Permissible load (at 0-1(10) V)	RL [Ω] > 3000 Ω
Display	Approx. 10 mm high, 4-digit LCD display, alternating humidity and temperature display
Working temperature	Electronics: -25…+50 °C Sensor head and tube: -40…+100 °C, for short time up to 120 °C
Storage temperature	-25…+70 °C
Relative humidity (electronic)	0…95 %RH (non-condensing). If there is a risk of condensation due to temperature changes, use the encapsulated or lacquered types (optionally available).

DESIGN & MOUNTING
Models	GHTU-1R-MP: wall version, standard probe length 50 mm (Product-ID 602585) GHTU-1K-MP: wall / channel version, standard probe length 220 mm (Product-ID 602587) GHTU-2K-MP: channel version, standard probe length 220 mm (Product-ID 602592) GHTU-SHUT-MP: absorption hat / weather protection (Product-ID 603896) GHTU-KABEL-MP: wall version with cable and high humidity sensor (Product-ID 604436)
Housing	ABS (IP65)
Sensor tube	Tube 14 mm Ø, with screw-type protection cap
Design type Kabel	With separated sensor tube, sensor head (Ø14 x 68 mm) connected to device via 1 m Teflon cable. Includes option high-humidity sensor.
Design type Shut	Heat absorption hat / weather protection shield, especially designed for measurements in the open air. The measuring results are not influenced by either sun or rain. Heat absorption hat made of plastic, Ø 110 mm, approx. 140 mm high, with a stainless steel base for wall mounting (3 fixing holes for screws with a max. shaft Ø of 5 mm). Large projection approx. 160 mm.
Electric connection	Elbow-type plug acc. to EN 175301-803/A (IP65)
Mounting	4 housing holes for wall mounting or by means of plastic tube clamps for duct mounting
Functions	Min-/max-value memory, offset and slope adjustable, output signal scaleable

ORDERING CODE	GHTU - 1 - 2 - 3 - 4 - 5 - 6 -GE
1. Design type	1R-MP = Surface design 1K-MP = Surface / duct design 2K-MP = Duct design KABEL-MP = Surface design with cable and high humidity sensor SHUT-MP = Weather protective shield / heat-protective hat incl. Option LACK and HO
2. Fitting length EL	-050 = 50 mm (standard for 1R) -220 = 220 mm (standard for 1K / 2K) -300 = 300 mm -400 = 400 mm -500 = 500 mm
3. Output signal	... = 4-20 mA (standard) -AV01 = 0-1 V -AV01G = 0-1 V (galvanically isolated) -AV10 = 0-10 V -AV10G = 0-10 V (galvanically isolated)
4. Options sensor	-00 = Standard sensor -HO = High humidity sensor
5. Option	-LACK = Encapsulated PC board
6. Option	-UNI = Selectable humidity display instead of the standard humidity values