ZS Sensors

The OEMCTRL line of intelligent zone sensors provides the function and flexibility needed to manage the conditions important to the comfort and productivity of the zone occupants. ZS sensors are available in a variety of zone sensing combinations to address your application needs. Combinations include temperature, relative humidity, and indoor air quality (carbon dioxide or VOCs (Volatile Organic Compounds)). Built to be flexible allowing for easy customization of what the user/technician sees. Designed to work with all OEMCtrl controllers, the ZS sensor line includes the ZS Base, ZS Plus, ZS Pro and ZS Pro-F.




ZS Plus

ZS Pro

ZS Pro-F



Standard - Temp only





Temp with CO2





Temp with Humidity





Temp with VOC





Temp, Humidity, CO2





Temp, Humidity, VOC






Key Features


All ZS Sensors


• Provide flexibility for any building sensing application with monitoring of key building conditions, including temperature, humidity, CO2, and VOC's
• Attractive, low profile enclosure in neutral color cover complements any room décor
• Combination sensing within one device efficiently reduces installation costs, wiring and wall clutter
• Multiple ZS room sensors can be daisy-chained to one controller for temperature averaging or high/low select to achieve optimal control

• A hidden communication port allows a laptop computer to be connected to the OEMCtrl Controller
• Mounts on a standard 2" by 4" electrical box for easy installation
• You choose the combinations for measurement of zone temperature and/or relative humidity, CO2, VOC
• Multiple models offer a choice of options, including a large easy-to-read display, local setpoint adjustment, local override, and fan control


ZS Plus Sensors


• Features a convenient local setpoint modification with an easy-to-use slide adjustment.
• Occupancy override is simple using the momentary push button on the ZS Plus. A bright LED provides an immediate indication of status. When the override button is pressed during an unoccupied mode, the zone reverts to an occupied setpoint for a predetermined period of time.


ZS Pro and ZS Pro-F


• Large, easy-to-read LCD on the ZS Pro can be configured to display virtually any analog or digital value in your equipment. Here are some examples: zone temperature, outside air temperature, energy-saving mode icon, heating setpoint, cooling setpoint, relative humidity, CO2, VOCs, override time remaining, fan status, compressor status, alarms, and much more.
• Occupancy override is simple using the "Manual On" momentary push button on the ZS Pro. A single push switches the zone to an Occupied mode for a preset period of time. The user can increase or decrease the override time with the up or down arrows, and the LCD displays precisely how long the zone will stay occupied. The occupied time increment and maximum override time are fully adjustable.
• Zone setpoints can be changed on the ZS Pro by pressing the up or down arrow buttons. Setpoint adjust increment amount and the maximum total adjustment are fully adjustable.
• Pressing the "Fan Speed" button on the ZS Pro-F incrementally adjusts the fan speed of the unit. The "Clg/Htg Mode" button can be used to select among several zone operation modes that are fully adjustable.


ZS Sensors with VOC


VOCs are Volatile Organic Compounds (VOCs). OEMCtrl ZS Sensors with the VOC feature actually reacts to all reducing gasses, which is any gas that gives off electrons when burnt, which includes all VOC's. Our sensor will be more sensitive to some of the more irritating ones but that is just a function of the sensing element and why this particular element is used in our sensor.

Depending on the source of the information, 5,000 to 10,000 unique Volatile Organic Compounds (VOCs) exist. VOCs are chemicals that contain carbon and have boiling points below 100°C. Most can be vapors at room temperature.


Families of VOCs detected are:
• CO, CH4, LPG
• Alcohols
• Ketones. Ketones are solvents. The best known are Acetone and Methyl Ethyl Ketone or MEK.
• Organic Acids. Common organic acids are Lactic acid, Acetic acid, Formic acid, Citric acid and Oxalic acid
• Amines. Amines are derivatives of ammonia.
• Aliphatic Hydrocarbons. Aliphatic hydrocarbons are flammable hydrocarbons with little or no odor. Such as hexane, paraffin, methane and acetylene.
• Aromatic Hydrocarbons. Aromatic hydrocarbons are flammable hydrocarbons with a discernible odor. Examples are benzene, furan, pyridine, toluene, asphaltene and picric acid.



Typical Source

Dipropylene glycol

Surface cleaners


Disinfectants, Human metabolism

Ethyl Alcohol

Cosmetics, Cleaners, Disinfectants, Detergents, Paints, Human Metabolism


Cosmetics, Artificial flavors, Insecticides


Biocides, Disinfectants


Human metabolism


Waxes, Polishes


Aerosol cleaners


Synthetic rubber, Human metabolism


Cosmetics, Cleaners, Artificial flavors, Prescription drugs


Natural gas, Human metabolism


Surface cleaners


Surface cleaners


Human metabolism


Adhesives, coatings, Plastics, Lubricants

Methyl methacrylate

Hard surface cleaners


Disinfectants, Repellants


Artificial flavors, Perfume, Human metabolism


Polystyrene foam, Refrigerants


Plastics, Cosmetics, Disinfectants


Perfume, Human metabolism


Fuel based heating, Cooking appliances, Cleaners


Waxes, Polishes


Dry cleaning


Spot cleaners


Paints, Coatings, Cleaners, Detergents, Smoking, Polyurethane lacquers


Human metabolism

r (1-methylethyl) cyclopropane

Adhesives, Coatings, Plastics, Lubricants


Plastics, Synthetic Rubber, Polyester clothing



Comparison of RS vs. ZS Sensors


RS Sensors (Legacy)

ZS Sensors

Power requirements Supplied by the 4-conductor cable 
(+12 Vdc @ 210 mA) from the controller.

The 4-conductor Rnet cable from a controller supplies +12 Vdc @ 210 mA.

The C02 sensors utilize significantly more power than other sensor types (up to 190mA on a read cylce). Use an external power supply if more than one CO2 sensor is used on the Rnet. Use the power requirements listed and guidance in the Installation Guide to calculate the size of the external power supply.


Range/Accuracy 50°F to 95°F (10°C to 35°C) ±0.45°F (0.25°C)

Temperature only range/accuracy:
32 to 122°F (0 to 50°C)
±0.35°F (0.2°C)

Temperature if humidity is included range/accuracy:
50 to 104°F (10 to 40°C)
0.5°F (0.3°C)


Environmental operating range 32–122°F (0–50°C), 10–90% relative humidity,  non-condensing

-4 to 122°F (-20 to 50°C), 10 to 90% relative humidity,  non-condensing


Overall dimensions Width: 2-3/4 in. (6.9 cm)
Height: 4-3/4 in. (12.1 cm)
Depth: 5/8 in. (1.6 cm)

Temperature sensor or temperature/humidity:
Width: 3 in. (7.62 cm)
Height: 4-13/16 in. (12.22 cm)
Depth:  13/16 in. (2.01 cm)

Temperature/humidity sensor with CO2 or VOC:
Width: 2-7/8 in. (7.3 cm)
Height: 4-13/16 in. (12.22 cm)
Depth: 1-1/4 in. (3.18 cm)


Physical labels English button labels
(warmer, cooler, etc)

Symbol button labels


LCD display Non customizable

Customizable. See Application Guide for details.


Occupancy indication RS Pro and Pro-F - Occupied/Unoccupied text on LCD display
RS Plus - Red LED indication

Green LED indication
ZS Pro / ZS Pro-F
ZS Plus


Degree F/C changeover on display Not available

ZS Pro - Change display with a BV parameter in control program
ZS Pro-F - Change display with a BV parameter in control program or with deg F/C switch on side of sensor


Rnet configuration 1 RS Plus, RS Pro, or RS Pro-F
1–4 RS Standards
1–4 RS Standards, and 1 RS Plus, RS Pro,
or RS Pro-F
Any of the above combinations, plus up to 2 BACview® devices, but no more than
6 devices total.

Up to 15 ZS Sensors of any combination
Up to 2 BACviews

* Although an Rnet can have 15 ZS Sensors, you can have no more than 5 sensors per control program. 


Eikon®LogicBuilder® programming Use RS Zone Sensor and RS Zone Sensor with Fan Control Microblocks

Use BACnet Analog Sensor Value Input and Sensor Binder Microblocks



Related Documents

ZS Cut Sheet

ZS vs RS Comparison Document

What are VOCs Document


RS Sensors (Legacy)

OEMCtrl's line of intelligent sensors includes RS Standard, RS Plus, RS Pro, and RS Pro F for use with our controllers. The RS Pro and RS Pro F have a large LCD display and easy-to-use interface keypad. The RS Pro F adds fan control to the user interface as well as a mode selection button. The sensors provide precision measurement and communication capabilities in an attractive low profile enclosure. A hidden communication port provides access to the equipment for commissioning and maintenance.


Key Features


• Attractive low profile enclosure in a neutral color that complements any room.

• Large, easy-to-read LCD on the RS Pro and RS Pro F displays zone temperature, outside air temperature, heating setpoint, cooling setpoint, and local override (after-hours occupancy) time.

• Precise 10K ohm thermistor with + 0.36ºF (0.2ºC) standard accuracy and less than 0.18ºF (0.01ºC) drift over a ten year span requires no maintenance or re-calibration.

RS Sensors

• Occupancy override that is fully programmable.

• Zone setpoints can be changed by pressing the Warmer or Cooler buttons. Adjustments are also fully programmable in Eikon®LogicBuilder.

• A hidden communication port allows a laptop computer or a BACview keypad to be connected to the control system.

• Multiple Room Sensors can be wired to one controller for temperature averaging or high/low select control.
(One RS Pro or RS Pro F with up to four RS Standard sensors.)

• Mounts on a standard 2" x 4" electrical box for easy installation.


Related Documents

Cut Sheet