HT1O RH/Temp Outdoor Air

Higher Reliability, Faster Installation, Superior Accuracy | Sense the Difference
2% or 3% accuracy (NIST certification options)
0-5V/10V and 4-20mA RH/Temp (thermistors optional)
LCD display with field calibration menu
Field replaceable element

  • 2% or 3% RH versions with field replaceable sensor
  • Switch selectable 5V/10V and 4-20mA RH/T transmitter outputs
  • Thermistor outputs for temperature optional
  • Field calibration. LCD and push-button menu allows easy adjustment of calibrated RH value as needed to maintain certification.
  • Replace a sensor without disturbing conduit
  • On-board temperature compensation for RH. Eliminates temperature coefficient errors and achieves an excellent measurement accuracy as well as high repeatability and offset stability.
  • State of the art testing facilities. Multi-point calibration certifcation options. Consult factory.
  • Industry leading 7-year warranty/ 2-year replaceable element warranty

Ask for a quotation

The HT1O Series is designed to be mounted on the building exterior to provide outside air RH measurement. The HT1O Series combines excellent stability with reliable operation in 2% or 3% RH accuracy options. Optional temperature transmitters, RTDs and thermistors add further flexibility when ordering. The standard LCD, gasketed lid and field replaceable elements make the initial installation and future service a breeze.

  • Replaceable element is ideal for difficult environments such coastal areas or process control such as poultry farms
  • Facilitating compliance with ASHRAE 62.1 standard for air quality
  • Indoor air comfort and control in HVAC systems
  • Maintain healthy air quality, minimize mold and other contaminants
  • Design is ideal for greenhouse applications

Power Supply

AC Supply/DC Supply

24VAC, 100mA max./ 12-30VDC, 50mA max

Outputs

RH and Temperature)

3-wire 0-5/10V(4) or 2-wire 4-20mA

Output scaling

RH
Temperature

0-100% RH
32-122°F (0-50oC) or -40-140°F (-40-60oC)

Thermistor/RTD

Optional

See ordering table

Media filter

Sintered stainless steel

Relative Humidity

Accuracy
Resolution
Hysteresis
Non-Linearity
Temperature coefficient
Response time(2)
Output update rate
Operating range
Long term drift
Normal Operating
conditions (3)

2% models, ±2% over 0 to 100% RH Range; ±1.5% typ
3% models, ±3% over 0 to 100% RH Range; ±2% typ
0.01%RH
±0.8%RH
Factory linearized <1%RH
Fully compensated by on-board sensor
8s
0.5s
0 to 100%RH (non-condensing)
<0.25%RH per year
41 to 140ºF (5°C to 60°C) @ 20% to 80% RH

Temperature

Accuracy
Resolution
Repeatability
Response time(2)
Output update rate
Operating range

2% models, <±0.25° C; 0.1° C typ @ 25° C
3% models, <±0.3° C; 0.25° C typ @ 25° C
0.01° C
0.08° C
2s
0.5s
-40 to 140oF (-40° to 60° C)

Enclosure

Materials
Unit Temp Rating
Enclosure Rating
Dimensions

ABS/Polycarbonate
-40 to 158oF (-40 to 70oF)
Nema 1; Add drain holes to enclosure bottom to achieve Nema 3R rating
4.0”h x 4.4”w x 2.1”d (+2.8” solar shield)

Agency

Compliance

CE, RoHS

(1) One side of transformer,, secondary is connected to signal common. Dedicated transformer is recommended.

(2) Time for reaching 63% of reading at 25° C and 1 m/s airflow.

(3) Long term exposures to conditions outside normal range at high humidity may temporarily offset the RH reading (+3%RH after 60 hours.)

(4) 15-30VDC/24VAC power supply voltage required for 10 volt ouput.

RELATED PRODUCTS