CHILLED-MIRROR HYGROMETER

Vigilant,THE COMPLETE

PRECISE HUMIDITY
MEASUREMENTSOLUTION™

INTRODUCING THE NEXT GENERATION HYGROMETERThe EdgeTech® Vigilant™ is a highly

providing greater control and operational

sophisticated digital dew point hygrometerstability. Another unique feature is Vigilant’s

engineered for a multitude of demanding

SetPoint mirror temperature control whichapplications and environments. It combinesallows the user to chill the mirror to a

the inherent accuracy and field provenpredetermined temperature above dew point

reliability of chilled-mirror technology withand alarm/alert the user if the dew point

the flexibility and speed of digital control — allattains or exceeds this threshold. To provide

within a package that is half the size of other,extended intervals of unattended operation,less sophisticated hygrometers.

the Vigilant boasts a new Automatic Balanceenvironment thanks to its wide -50 to 90ºC
measurement range, optional pressure andtemperature inputs for calculating any
psychrometric variable, and flexible
mounting. Using optional accessories, Vigilant
can be adapted for bench-top, portable, wall,
pipe or rack use in just seconds.

corrects for the light reducing
affects of mirror contaminates. In addition, theVigilant features both
analog and digital outputs.
O-5VDC and 4-20mADC
can be assigned to any
parameter and are userscalable throughout theEffortless. Another practical Vigilant

entire range. It offers

innovation is the menu-driven graphical

RS232C duplex serial forbacklit LCD display. This hands-free design

programming, data output,

allows operators to clearly view up to threestatus indication of control,parameters simultaneously, along with themirror condition, andstatus of ServoLock™, ABC, mirror condition,optional relays.

alarms, date and time. With Vigilant, nomanual scrolling or other distracting selecting
is necessary to monitor major indicators. And
the front panel provides easy access to a fully
programmable menu.
Advanced. The Vigilant is loaded with hightech features, including ServoLock™, a new
digital control scheme that improves
sensitivity and response characteristics while

Proven. The Vigilant isfully NIST-traceable andbacked by more than 30years of hygrometer
experience.

Vigilantfor virtually any process or laboratory

Control (ABC) scheme that automatically™

Versatile. Vigilant is the perfect hygrometer

Measurement Range

(C)

(F)

100

212

90DE
W/FROSTPOIN
TT
E
M
PE
RA
TUR
E

194
Single-Stage Sensor (45ºC Depression @ 25ºC)

80

176

Two-Stage Sensor (65ºC Depression @ 25ºC)

70

158

60

14050

122

40

104

3086

20

68

1050

032-10

14-20*-4-30-22-40-40-50-58-60-76-70-94

*-80

C
F

032

1050

2068308640 50
104 1228060 70
140 158 176-112
90 100194 212

Sensor Base Temperature* With a base temperature of 20ºC/68ºF you can expect a single stage
sensor to be able to measure dew point as low as -23.3ºC/-10ºF.

THE PROFESSIONAL’S CHOICE
Combining chilled-mirror accuracy andreliability with state-of-the-art digital electronics, theVigilant is the professional’s choice for hygrometers. It
is unsurpassed in versatility; capable of measuring any
psychrometric variable in a variety of applications andenvironments.
If your application calls for theuncompromising precision, flexibility, and fullfunctionality of the next generation inhygrometers, contact your local EdgeTech
representative or call us toll free at
800-276-3729. Or visit the company’s
web site at www.edgetech.com;
e-mail at h2o@edgetech.com.

EdgeTech Edge
Proven chilled-mirror technology
NIST-certified calibration
1 or 2 stage flow-through sensors
Dual alarms
Automatic Balance Control (ABC)
Serial and analog outputs
Vigilant Vantage
ServoLock™ digital control
SetPoint mirror temperature control
Backlit hands-free display
Lightweight portability
Flexible on-site placement
Versatile Packaging Options
Bench-top
Portable
Wall mount
Pipe mount
Rack mount
Proving Grounds
Lab calibration standards
Continuous industrial processes
Environmental chambers
Heat treating furnaces
Automotive test stands
Curing ovens
Process dryers
Clean rooms
Plant airMetrology

™

Vigilant

PERFORMANCE SPECIFICATIONSACCESSORIESMEASUREMENT
Range
Dew/ Frost Point:
Temperature (optional):
Relative Humidity (optional):
Pressure (optional):-50 to 90°C (-58 to 194°F)-50 to 100°C (-58 to 212°F)
0 to 100% RH
0-25psia or 0–300psig(other ranges available consultfactory)
Note: Other humidity parameters available (gr/lb, PPMv, PPMw, etc.)consult factory.

Accuracy
Dew/ Frost Point:
Temperature (optional):
Relative Humidity (optional):
Pressure (optional):
Repeatability:
Hysteresis:
Response Time:
Update Rate:
Display Resolution:
Dew Point Depression:+/- 0.2°C (+/-0.36°F)+/- 0.2°C (+/-0.36°F)+/- 0.5%*+/- 0.5% of full scale+/- 0.05°C (+/- 0.09°F)
None
1.5°C (2.7°F)/Sec. nominal above
0.0°C(32°F)
1/sec.
0.1°C/ °F/ %RH, 0.01psia
S1- 45°C (81°F), S2- 65°C (117°F)

Power:
Operating Temperature
Dew Point Sensor:
Control Unit:
Temperature Sensor (optional):
Pressure Sensor (optional):

95-240VAC, 50-60Hz, 50 Watts Max.

Sample Connection:
Sample Flow:
Sample Pressure:
Auxiliary Coolant:
Outputs
Analog:Female 1/8in NPT
0.25 to 2.5 L/min. (0.5 to 5.0scfh)
0 to 22 bar (0 to 300psia)
2 L/min. (0.5GPM) at 100psig Max.

Display:
Wetted Materials:

Temperature Probe 100
Ohm PRT housed in 316
SS with 3m(10ft) cable(available up to 75m(250ft)), all software for
RH computation

Pressure Kit:

Pressure Transducer 0 to25psia or 0 to 300psig(other ranges availableconsult factory) 316 SS,
all software for PPMv/gr/lb computation

RemoteMounting Kit:

3m (10ft) sensor extension cable(available up to75m(250ft))

Sampling Module: Vacuum pump (0.75 to
1.35kg/cm2 (10.7 to 19.2psia)) 115/230VAC, variable area flow meter,
compression fittings,
NEMA-4X enclosure
Wall Mounting Kit: Includes mounting
brackets and all associated hardware

FUNCTIONALITY

Digital:Humidity Kit:

Pipe Mounting Kit:
0 to 100°C (32 to 212°F)
0 to 50°C (32 to 122°F)-50 to 100°C (-58 to 212°F)-18 to 79°C (0 to 175°F)

1- user scalable 4 to 20mA & 0 to
5VDC standard.
(3 analog outputs available)
RS232C, duplex serial for data
output, set-up, status indication ofcontrol, each relay, & mirror condition
Back-lit multi-line graphical LCD
Anodized Aluminum, Delrin, Epoxy,
Glass, & Rhodium

Explosion-Proof
Sensor Housing:

Includes wall mounting
kit & additional brackets
for horizontal or verticalpipe installations
Class 1 Div. 1 Groups
C&D (Remote Mounting
Kit required)

Analog outputs:

Up to 2 additional
analog outputs

Alarm Relays:

2 user scalable latchingor unlatching Form C,SPDT, 3A max.

Due to continuous productdevelopment, specifications subject to change without notice.
* Nominal from calculation.

PHYSICAL
Dimensions (lxwxh):
Weight:Shipping Weight:
Mounting:

30.8x19.4x10.2 cm / 12.1x7.63x4 in
4.5kg (10lbs)
5.9kg (13lbs)
Bench-top standard

E-mail: h2o@edgetech.com • Web site: www.edgetech.com
Tel.: (508) 478-9500 • Fax: (508) 634-3010 • 455 Fortune Boulevard, Milford, MA 01757