rh measurements in ATEX zone 1

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HygroFlex5-EX

intrinsically safe, two-channel, interchangeable stainless steel probes

The new HygroFlex5-EX series is a two-channel transmitter for the measurement of humidity and temperature in explosive atmospheres.

The HF5-EX series has an aluminium transmitter with an optional display. Probes are certified for operation in Zone 0/20. The transmitter itself is certified for Zone 1/21. The electrical isolation permits the measuring system to be operated without an intrinsically safe power supply.

Features
• Measurement of relative humidity and temperature, optional output of dew point and other calculated parameters
• Safe operation in areas with explosion risk
• Intrinsically safe electrical construction
• No intrinsically safe power supply required
• Interchangeable stainless steel probes
• Robust aluminium housing

For further information about humidity measurement and hygrometry issues, please visit our Masterclass section.

HC-2 EX PROBES
	Standard EX Probe HC2-SM-EX Details
	Atex Cable Probe HC2-IM-EX Details
	Atex Screw-in Cable Probe HC2-IE-EX Det ails

GENERAL
Measurement	Humidity and temperature
Number of probes	1
Sensor	Compatible with all HC2...EX probes
Measurement range	0 to 100 %RH; -40 to 85 °C
Start-up time	Standard cold <60 s / warm <30 s
Accuracy at 23 °C ±5 K	0.8 %RH; 0.1 K
Measurement interval	20 to 240 s
Calculated parameters	All psychrometric parameters available
Max. cable length	2/5/10 metres
Display	Optional, LCD without backlight
Firmware upgrade	With internet and HW4 software
Service interface	UART internal service interface (only to be used outside the explosive zone
Certification
CE / EMC compatibility	EMC Directive 2004/108/EC
ATEX directives	EU94/9/EC (ATEX)
EX identification	EXII 2(1) G Ex eb mb [ia Ga] IIC T5 Gb EXII 2(1) D Ex tb [ia Ga] IIIC T80°C Db
FDA / GMP compatibility	FDA 21 CFR Part 11 and GAMP compatible
Housing material /protection	Aluminium (DIN EN 1706 EN AC-AlSi 12 (Fe))/IP66
IP rating	IP66
Probe material	Stainless steel
Environmental
Application temperature housing/electronics	-40 to 60 °C without display -10 to 60 °C with display
MECHANICAL
Dimensions (wall mount & duct mount)	160 x 100 x 61 mm
Weight	Wall mounted version: 1030 g Duct mounted version: 1140 g
ELECTRICAL AND UTILITIES
Configuration
Electrical connections	Connections: Ex-e terminals (0.2 to 2.5 mm2 ) Cable gland: 16 x 1.5 (Ø cable 4.5 to 7 mm)
Power supply	10 to 28 VDC
Current consumption	2x24 mA start up / 2x20 mA operation
Analogue output options
Number	2
Current	4 to 20 mA, two-wire
Accuracy at 23 °C	< 20 µA
Galvanic isolation	Yes
Maximum load	500 Ohms
Accessories
Filters	Steel sinter filter,SP-FN15
Cable Gland	AC1301-MEX for duct mounting and cable probes (IM)
All specifications subject to change