About 4 - 20 mA - 3 WIRE INDUSTRY STANDARD TRANSMITTERS

Oftenit is more cost effective to replace a sensing head with one which is pre-calibrated at a testingstation, thus reducing disruption of the measuringsystem. Technovation offers suchan industry standard 4-20mA transmitterconsisting of a gas sensor, its associated circuitry with adisplay and in a weather-proof housing.

FEATURES

The three-wire transmitter allowsthe power and signal to be realized on a three-core wire. One core for positivesupply of 12 to 24 VDC, the second core for the 4 to 20 mA output and the thirdcore for the 0 volt supply. The transmitter is immune to voltage drops fromlong runs and noise from motors, relays,actuators, switches, transformers and industrialequipment.

APPLICATIONS

Every transmitter is suppliedpre-calibrated for a customer specific range. The table below gives anindication of t he gases/ranges offered. These transmitters can be connected toa DC system which supplies the DC Power for the module. They could also beconnected to stand alone controllers and PLCs and other data acquisitionsystems

STANDARD SPECIFICATIONS

PowerSupply : 12 to 24 VDC .

Sensor types offered : Non dispersive Infra Red ( NDIR) ,Pellistor, DP moisture , RH, VOC, PID & many other types as applicable.

Duty : Continuous

Display : 4-digit LED

Operating temp :20 oC to45 oC

Operating Humidity :10 - 90 % RH

Operating Pressure :Ambient

Load resistance :< 500 Ohms

Calibration :Via built in Span and Zeropotentiometers.

Housing : Poly Carbonate weather proof housing. OR Aluminum JN. Box

Enclosure size : 12x8x8.5 (WxHxD) Cms

Sampling : Diffusion mode ORin Flow through mode

TABLE OF SENSORS, GASES & RANGES
TYPE OF SENSOR	RANGE
PELLISTOR	0-100% LEL OF COMBUSTIBLE GASES. OTHER RANGES ON REQUEST
NDIR	CO2 0-5% OR 0-10% OR 0-20% OR 0-100%
	CH4 0-5 % OR 0-100%
Thermal conductivity	Gas and range on request
Semiconductor	Gas and range on request
PID	Gas and range on request
OTHER GASES AND RANGES ON REQUEST

TABLE OF GASES & Rcable resistace, and the measuringresistor at the remote receiver and any meters used for calibration

Reliable Performance in Demanding Environments

Designed for process control and industrial automation, this transmitter excels in durability and accuracy. With a rugged aluminium enclosure and IP65 rating, it offers protection against dust and water. High isolation voltage and robust EMC compatibility ensure stable operation in electrically noisy surroundings, making it ideal for challenging industrial sites.


Easy Installation and Versatile Mounting Options

The transmitter supports both panel and DIN rail mounting, suited to varied installation preferences. Screw terminal interfaces and a standard 1.5 m cable simplify connectivity. Factory calibration ensures immediate readiness, while field adjustability provides adaptability, allowing straightforward deployment in new or existing systems.