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HX94-Srs-Temp-RH-Sig-Cond
Temperature/Relative Humidity Conditioner/Transmitter Probe
Models In Stock
- ± 2% RH Accuracy ± 0.6C Temperature Accuracy
- Stainless Steel NEMA 4 Housing
- Duct or Wall Mountable Mounting Hardware Included
- 4-20mA or 0-1Vdc Output Options
HX94-Srs-Temp-RH-Sig-Cond
From
$
468.85
Models In Stock
Product Overview
- Accuracy ±0.6 °C
- Cable Length 305 mm
- Enclosure Ratings NEMA Type 4
- Flange Note Removable, variable 25.4 to 227 mm (1 to 9") depth; 70 mm (2.75") dia., duct hole 21 mm (0.812") dia. 4 mtg holes. 4 mm (0.156") dia. (for #6 sheet metal screws) on 51 mm (2.00") dia. circle; wall mounting bracket included
- Flange Size 227 mm
- Measurement Type Temperature, Humidity
- Probe Diameter 19 mm
- Probe Length 254 mm
- Relative Humidity 3 to 95%
- Relative Humidity Accuracy ± 2% RH
- Repeatability ± 0.3°C
- Series ID HX94-Srs-Temp-RH-Sig-Cond
- Supply Power Type DC
- Temperature Measurement, Max 85 °C
- Temperature Measurement, Min -20 °C
- Time Constant (for 60% response) Less than 2 sec in moving air (1m/sec) less than 10 sec in still air
- Time Constant, Relative Humidity (for 90% response at 25°C; in moving air, 1m/sec.) Less than 20 seconds, 10 to 90% RH Less than 30 seconds, 90 to 10% RH
- Weight 198 g
Supported Applications
The Omega HX94 series is a stainless steel relative humidity and temperature probe transmitter designed for duct mount monitoring applications. The unit provides reliable, low-cost measurement of air conditions using solid-state sensors that offer excellent sensitivity, fast response, and stability. It delivers linearized outputs suitable for interfacing with most display and control devices.
Documented media compatibility includes air and non-corrosive gases. The probe is not intended for use in medical applications or on humans.
Operating Conditions & Performance
The HX94 series operates within a process temperature range of -20 to 85°C (4 to 185°F). Relative humidity measurement spans 3 to 95% RH, with an accuracy of ±2% RH and repeatability of ±1% RH. Temperature is measured from 0 to 100°C (32 to 212°F) using a Thin-Film 100 Ω Platinum RTD (DIN 43760), providing an accuracy of ±0.6°C (±1°F) and repeatability of ±0.3°C (±0.5°F).
Response times vary by condition: less than 2 seconds in moving air at 1 m/sec, and less than 10 seconds in still air for temperature response (60% response). For relative humidity, the time constant is less than 20 seconds for a 10 to 90% RH change and less than 30 seconds for a 90 to 10% RH change. The unit requires a power supply of 6 to 30 Vdc with polarity protection.
Configuration Options
The series supports multiple output configurations, housing styles, and connection types:
- Output Signals: Available as HX94C for 4 to 20 mA current output or HX94V for 0 to 1 Vdc voltage output.
- Housing & Enclosure: Features a stainless steel NEMA 4 enclosure with a removable protective sensor filter cap. The probe dimensions are 254 x 19 mm (10 x 0.75") diameter, including a 305 mm (12") cable.
- Process Connections: Configurable for duct mounting via a removable, variable depth flange (adjustable from 25.4 to 227 mm or 1 to 9 inches) requiring a 21 mm (0.812") hole; wall mounting is supported with an included bracket.
- Electrical Connections: Options include a standard 4-pin mating connector accepting 26 to 18 AWG wires, or integrated lead wire versions: HX94CW/VW models feature a 1 m (3') braided and shielded cable with PVC sheathing; HX94CNPT/VNPT models provide a ½" male NPT fitting with a 1 m (3') braided/shielded cable.
- Power & Load: For current output, maximum loop impedance is calculated as Rmax = (power supply voltage - 6 volts) / 0.02 amps. For the 1 to 5 Volt Output version, load resistance should be 250 Ohm.
Key Product Differences
The HX94 series is differentiated by output type and connection method:
- HX94C / HX94V: Standard models with 4 to 20 mA or 0 to 1 Vdc outputs, respectively, utilizing a 4-pin mating connector.
- HX94CW / HX94VW: Models equipped with integrated 1 m (3') lead wires instead of the detachable connector.
- HX94CNPT / HX94VNPT: Variants featuring a ½" male NPT fitting and integrated leads for conduit connection.
The series is RoHS 2 Compliant. Weight with the duct flange is approximately 198 g (7 oz).
Show Ratings & Reviews
Rated 5 out of
5
by
Anonymous from
Purchaser
Excellent for my application. We use these in our ovens and proofers
Date published: 2024-11-27
What is the maximum pressure at which this item can operate?
Thank you for your inquiry engtech3. Unfortunately, the HX94C is not pressure rated.
Date published: 2022-08-19
Is the HX94C CE compliant?
The HX94C is not CE approved. The similar HX94BC is CE approved;
https://www.omega.com/en-us/control-monitoring/air-soil-liquid-and-gas/temperature-and-humidity-transmitters/hx94b-srs-temp-rh-sig-cond/p/HX94BC
Best regards
OMEGA
Date published: 2024-04-28
What type of mating connector is used - I need to order another one.
Thanks for your question. The mating connector is listed on the Data sheet (PDF). The model number is HX94-MC. If you add to the cart it will come up to place your order. We do have stock available.
Date published: 2019-05-03
Do we need to purchase a power cable along with DPPT series?
Hi Shibo_F,
Thank you for the inquiry. Yes, you will need power/signal cable. 4 conductor twisted shielded cable, TX4-100, can be used for this purpose.
Best regards,
OMEGA
Date published: 2023-12-03
How is the accuracy if the probe has condensation on it? Is there an IP rating for the probe?
Hi Eddie
Thank you for the inquiry. This probe is not designed to handle condensing humidity conditions. If the sensor gets water droplets on the element it will go into saturation with max output. It would have to dry clean without corrosion to come back on line in calibration. The housing is rated NEMA 4.
Best regards
OMEGA
Date published: 2023-02-15
Which meter do you recommend to use with this directly to display the value?
Thank you for your inquiry. You can use our DPPT-series Platinum series universal input meter with this sensor. Here is the link to the pdf catalog: https://assets.omega.com/spec/DPPT-Series.pdf
Date published: 2023-11-22
Can I get the readings with the combination of followings? 1 HX94V + DPPT series Do I need to calibrate DPPT?
Hi Shibo_F,
The HX94V has 2 outputs so you would need 2 displays. You would need to set up and scale the display to match the calibrated range of the HX94V.
Best regards,
OMEGA
Date published: 2023-12-03
What are the accessories that are required for this one? To what instrument is the 4 pin connector connected?
Thank you for your inquiry. The primary accessories required are a power supply (shown under accessories) on product page, and 4 conductor cable to mate with supplied connector that would be then connected to an instrument to read the values. There are two 4-20 mA outputs (one for temperature, one for relative humidity) that can be connected to any instrument (panel meter, chart recorder, controller, etc.) that accepts a 4-20 mA signal and can be scaled to represent temperature or relative humidity.
Date published: 2023-03-28