ORP Transmitter - Q45R


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California Regulatory Information

SKU: 005422
4.4” x 4.4” x 3.5”
1 lbs.

Product Overview

ATI Monitoring

The Q45R ORP Transmitter is the ideal choice ORP monitoring applications. The Q45 system provides the accuracy, versatility, and durability required for virtually any ORP monitoring system. The transmitter is available in two types: ORP, which can be selected when ordering. The Q45R transmitters use differential type sensors designed for long life in demanding applications. Differential sensors are well-suited for applications that quickly poison conventional ORP sensors, and are easily serviced. A variety of sensor styles is available to meet the need of almost any applications.

 There are 3 Power Options to choose from on Q45R Transmitter

  • 12-24 VDC, 2-Wire (single output only)
  • Portable Battery with two 0-2.5 V Outputs
  • External 5-17 VDC with two 0-2.5 V Outputs


  • Loop or Battery-Operated Power Options
  • Differential Sensors for long operating life
  • Submersion, In-Line, or Sanitary-Style Sensors
  • Clear Display -Large, easy-to-read LCD display.
  • Special High Purity sensor option
  • Adapts to Conventional pH or ORP sensors
  • Flexible Mounting - NEMA 4X (IP-66) enclosure is suitable for wall or pipe mounting.

Applications for the Q45R

  • Cooling Towers
  • Potable Water Treatment
  • Wastewater Treatment
  • Chemical Process Control
  • Plating Baths
  • Metals Precipitation
  • Streams & Rivers
  • Boiler Feedwater
 More Information
 Sensor Type
ORP: Series Q25R Differential or Conventional types
 Display Range 0.02 pH or 2 mv
 Accuracy 0.01 pH or 1 mv
 Warranty 1 Year
 Repeatability 0.01 pH or 1 mv
 Sensitivity 0.01 pH or 1 mv
 Analog Output
  • 2-Wire unit: Single 4-20 mA DC, 450 ohms maximum
  • Battery unit: Two 0-2.5 VDC, 50K ohms minimum
  • External DC: Two 0-2.5 VDC, 50K ohms minimum
 Power Requirements  
  • 2-Wire unit: 17-30 VDC, 25 mA maximum
  • Battery unit: 2 AA Alkaline batteries
  • External DC: 5-17 VDC, 10 mA maximum
 Output Isolation 600 V Galvanic isolation
 Enclosure NEMA 4X (IP-66) Polycarbonate, V-0 flammability
 Weight 2-Wire of External DC Unit: 1lb. (0.45 Kg) 
Battery Unit: 2 lbs. (0.9 Kg)
 Certifications CE marked to BS EN 61326-1:2006 Standard 
UL and CSA General Purpose
 Size 4.4”H x 4.4”W x 3.5”D (111 x 111 x 90 mm)
 Mounting Options Wall or pipe mounting bracket supplied
 Conduit Entry Two PG-9 cord grips, 0.16-0.31” diameter cable
 Ambient Temperature
  • Operating: -40° to + 60°C
  • Storage: -40° to + 70°C
 Ambient Humidity 0-95%, Non-condensing





Warranty Information

Seller warrants that all Products will conform to the Specifications and will be free from defects in material workmanship and programming. Claims for Products not complying with this warranty shall be submitted by Buyer no later than 12 months from delivery date to Buyer. Seller shall promptly repair or replace, at its option and expense, non-complying Products. The shipment of non-complying Products by Buyer to Seller, and the return shipment of repaired or replacement Products by Seller to Buyer shall be at Seller's expense, unless it shall be determined that Buyer returned a Product that was in compliance, in which case such cost shall be borne by Buyer and, if paid by Seller, these expenses shall be reimbursed by Buyer within thirty (30) days of notice by Seller. Buyer shall receive a credit for any non-complying Products returned for repair or replacement. All non-complying Products shall be returned to Seller (at its offices or as otherwise instructed) no later than 30 days as of the date the non-compliance of any such Product has been discovered. Seller is NOT responsible for any/all damages suffered to the Products that is caused by the Buyer. Such as but not limited to damage by wrong electrical current, damage through crush or dropping the product, damage through untrained users of Product, damage through improper operations.

California Regulatory Warning

Example Image
Use in unoccupied spaces only.
Health hazard warning: emits ozone.

This product is not CARB Certified (Ozone Emissions for Air Cleaners).
Product Disclaimer: Does not meet California air cleaner regulation requirements; cannot be shipped to California.