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Universal VOC Gas Sensor Model PI-700/701

Brand: Detcon Inc

Model PI-700 is a non-intrusive “Smart” sensor that use photo-ionization detector technology to monitor VOC gases over ranges from 0-10 ppm to 0-5,000 ppm. 

In the PI-700 sensor design, Detcon has successfully converted the sensitive laboratory style PID technology into a rugged, environmentally insensitive, and long-life industrial gas sensor. 

The plug-in, field replaceable detector features over-sized gold-plated connections that help prevent corrosion. 

The PI-700’s rugged framework includes an electro-polished 316 stainless steel housing with fully encapsulated electronics and dual layer surge protection. 

This innovative design virtually eliminates sensor failure due to water ingress, corrosion, vibration, and transient spikes. 

A primary feature of the Model PI-700 is embedded intuitive software that simplifies operator interface by guiding the user through routine calibration, configuration, and fault diagnostic functions using a built-in alpha/numeric display. 

The Model PI-700 is equipped with standard analog 4-20mA, and Modbus™ RS-485 outputs. Among its unique features is a wireless option that can be used with Detcon’s SmartWireless® product line. 

Additional integration options include a Remote Alarm Module (RAM) and HART. Detcon’s PID sensors have a long shelf life and are supported by an industry leading warranty.
Features
  • Failsafe User-Friendly Interface 
  • LED Display (With Antiglare Cover) 
  • Full Text Display Method 
  • Non-intrusive Interface 
  • Auto Zero/Auto Span 
  • Pre-emptive Fault Diagnostics Environmentally Bulletproof 
  • Electropolished 316SS Construction 
  • 100% Epoxy Encapsulated Circuitry 
  • Bulletproof I/O Protection 
  • Water-Proof, Corrosion-Proof, Vibration-Proof Modular and Serviceable 
  • Modular Design 
  • Plug and Play Components 
  • Quick Thread Release (For Sensor Replacement) 
  • Integral Calibration Port

Specifications

Brand

Sensor Type

  • Continuous diffusion/adsorption
  • Photo Ionization Detector (PID)
  • Plug-in replaceable intelligent type (with replacement lamp)

Sensor Life

  • 2 years typical

Measurement Range

  • Gas Dependent, ranges as low as 0-10 ppm or as high as 0-5,000 ppm (consult Detcon)

Accuracy/Repeatability

  • ± 10 % of reading or ± 2 % of range (greater of )

Response Time

  • T50 < 30 seconds; T90 < 60 seconds

Outputs

  • Linear 4-20 mA DC
  • RS-485 MODBUS-RTU

Electrical Classification

  • Explosion-proof cCSAus Class I, Div. 1, Groups B, C, D (Tamb = -20° to +50° C) Class I, Zone 1, Group IIB+H2
  • ATEX II 2 G Ex d ib IIB + H₂ T4 Gb (Tamb = -20° to +50° C)

Ingress Protection

  • NEMA 4X, IP66

Safety Approvals

  • cCSAus
  • ATEX
  • CE Marking

Warranty

  • PLUG-IN DETECTOR - 1 YEAR
  • TRANSMITTER - 2 YEARS

Operating Temperature Range

  • -4° to +122° F; -20° to +50° C

Storage Temperature Range

  • -4° to +122° F; -20° to +50° C

Operating Humidity Range

  • 0-100 % RH, Non-Condensing

Dimensions

  • 7" H x 2.2" Dia.; 178 mmH x 65 mm Dia. (sensor assembly only)
  • 11" H x 6.1" W x 3.75" D; 280 mmH x 155 mmW x 96 mmD (with junction box)
  • Mounting holes (J-box) 5.5"; 140 mm center to center

Weight

  • 2 lb, 0.907 kg (sensor only)
  • 5 lb, 2.72 kg (with Aluminum J-Box)
  • 9 lb, 4.08 kg (with Stainless Steel J-Box)

Power Input

  • 11-30 VDC

Power Consumption

  • Maximum = 65 mA (1.6 watts)

Inrush Current

  • 1.67A @ 24 V

RFI/EMI Protection

  • Complies with EN 50270

Analog Output

  • Linear 4-20 mA DC (1,000 ohms max loop load @ 24 Vdc)
  • 0 mA - All Fault Diagnostics
  • 2 mA In-Calibration
  • 4-20 mA 0-100 % Full Scale
  • 22 mA Over-range condition

Serial RS-485 Output

  • RS-485 Modbus RTU

Baud Rate

  • 9600 BPS (9600,N,8,1 Half Duplex)

Status Indicators

  • 4-digit LED display with gas concentration
  • Full-script menu prompts for AutoSpan,
  • Set-up Options, and Fault Reporting

Faults Monitored

  • Loop, Input Voltage, Zero, Missing Sensor, Processor, Memory, Calibration

Cable Requirements

  • Power/Analog 3-wire shielded cable Maximum distance is 13,300 ft with 14 AWG
  • Serial Output 2-wire twisted-pair shielded cable specifically for use with RS-485 installations Maximum distance is 4,000 ft to last sensor

I/O Protection

  • Over-voltage, Miswiring, EMI/RFI Immunity

  • Pharmaceutical industry 
  • Power plants 
  • Chemical industry 
  • Air quality
  • Refineries and petrochemical plants 
  • Solvent recovery systems 
  • Waste water treatment plants 
  • Marine and off-shore oil wells 
  • Pulp and paper industry 
  • Painting and coating operations

Documentation

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