0-5V/10V and 4-20mA RH/Temp (thermistors optional)
LCD display with field calibration menu
Field replaceable element
Applications
HVAC room humidity and temperature measurement and control
Replaceable element is ideal for difficult environments such as swimming pools
The HT1D Series is designed with both the engineer and field technician in mind. The HT1D Series combines excellent stability with reliable operation in 2% or 3% RH accuracy options. Optional temperature transmitters, RTDs and thermistors add further flexibilty when ordering. The standard LCD and field replaceable elements make the intitial installation and future service a breeze.
Senva duct RH gives you the edge. Thanks to our chip on board CMOS sensor, you get stable, temperature compensated, noise-free performance. Add in field adjustbility with LCD and you can address the most demanding applications with ease. Our sensor is protected by a sintered stainless steel media filter for long life. And should the element ever need replacing, you can do so by simply removing it without disturbing the installation making it ideal for harsh environments. Choose from temperature transmitter or RTD/thermistor options. Trust Your Better Senses.
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
Easy to maintain
Field calibration. LCD and push-button menu allows easy adjustment of calibrated RH value as needed to maintain certification.
Field replaceable sensor—without disturbing conduit
Superior RH sensing
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. Certification options: 8-point (NIST traceability—consult factory)
Quality
Industry leading 7-year warranty/ 2-year replaceable element warranty
SPECIFICATIONS
Power Supply
0-5V or 0-10V operation
12-30VDC/24VAC(1), 15mA max.
4-20 mA operation
12-30VDC, 30mA max.
Outputs
RH% and Temperature
3-wire 0-5/10V(4) (jumper) or 2-wire 4-20mA, selectable
Output scaling
RH%
0-100% RH
Temperature
32-122°F (0-50°C) or -40-140°F (-40 to 60°C) (jumper)
Thermistor/RTD
Optional
See ordering table
Media filter
PBT with water-vapor permeable membrane
Relative Humidity
Accuracy
2% models, ±2% max 0 to 100%RH; ±1.5% typ 0 to 80% RH @25°C
3% models, ±3% max 0 to 100%RH; ±2% typ 0 to 100% RH @25°C
Resolution
0.01%RH
Hysteresis
±0.8%RH
Non-Linearity
factory linearized <1%RH
Temperature coefficient
fully compensated by on-board temp sensor
Response time (2)
8s
Output update rate
0.5s
Operating range
0 to 100%RH (non-condensing)
Long term drift
<0.25%RH per year
Operating conditions (3)
41 to 140°F (5 to 60°C) @20 to 80% RH
Temperature
Accuracy
2% models, <±0.25°C; 0.1°C typ @ 25° C
3% models, <±0.3°C; 0.25° C typ @ 25° C
Resolution
0.01° C
Repeatability
0.4° C
Response time (2)
8s
Output update rate
0.5s
Operating range
-40 to 140°F (-40 to 60°C)
Enclosure
Materials
ABS/Polycarbonate
Dimensions
4.0"h x 4.4"w x 2.1"d (+6.8" probe)
One side of transformer, secondary is connected to signal common. Dedicated transformer is recommended.
Time for reaching 63% of reading at 25° C and 1 m/s airflow.
Long term exposures to conditions outside normal range at high humidity may temporarily offset the RH reading (+3%RH after 60 hours.)
15-30VDC/24VAC power supply voltage required for 10 volt output.
