GREYSTONE HAS AN ISO 9001 REGISTERED QUALITY SYSTEM

OUTSIDE HUMIDITY/TEMPERATURE TRANSMITTER

HTOS SERIES

PRODUCT DESCRIPTION

The HTOS series uses a highly accurate and

reliable Thermoset Polymer based capacitance

humidity sensor and Platinum RTD temperature

sensor together with state-of-the-art digital

linearization and temperature compensated

circuitry to monitor humidity levels. A hinged,

gasketed weatherproof Polycarbonate enclosure

provides easy of installation and protection from

the elements.

TYPICAL INSTALLATION

For complete installation and wiring details,

please refer to the product installation

instructions.

The HTOS should be mounted on an outside

North facing wall, under the eaves which will

provide protection from direct sunlight and wind.

The HTOS can be mounted directly to buildings

wall face using the four provided mounting holes.

There is a 0.85” hole for conduit connection on

rear of enclosure.

HUMIDITY SENSOR TYPE

Thermoset polymer based capacitive

TEMPERATURE SENSOR TYPE

1000Ω Platinum, IEC 751, 385 Alpha, thin film

HUMIDITY SENSOR ACCURACY

±2, 3, or 5 %RH (5 to 95 %RH)

TEMPERATURE SENSOR ACCURACY

±0.1% of span

SENSOR RESPONSE TIME

15 seconds typical

MEASUREMENT RANGE

0 to 100 %RH

HYSTERESIS

±1.5 %RH maximum

REPEATABILITY

±0.5 %RH typical

LINEARITY

±0.5 %RH typical

OPERATING TEMPERATURE

-40 to 50°C (-40 to 122°F)

OPERATING HUMIDITY

0 to 95 %RH non-condensing

POWER SUPPLY

18 to 35 Vdc, 15 to 26 Vac

CONSUMPTION

22 mA maximum

INPUT VOLTAGE EFFECT

Negligible over specified operating range

PROTECTION CIRCUITRY

Reverse voltage protected and output limited

OUTPUT SIGNAL

4-20 mA current loop, 0-5 Vdc or 0-10 Vdc (factory configured)

OUTPUT DRIVE @ 24 VDC

Current: 550Ω max

Voltage: 10,000Ω min

INTERNAL ADJUSTMENTS

Clearly marked ZERO and SPAN pots

ENCLOSURE

B: Grey Polycarbonate, UL94-V0, IP65 (NEMA 4X)

TERMINATION

Screw terminal block (14 to 22 AWG)

COUNTRY OF ORIGIN

Canada

SPECIFICATIONS

112.5 mm

4.43"

99.7 mm

3.925"

25.4 mm

1.00"

25.4 mm

1.00"

116.5 mm

4.585"

0.5" NPT

53.7 mm

2.115"

OSA Humidity

Sensor

North