RK Instruments

Single Channel

image of GP-146 to be place here	Model GP-641A (Single -channel combustible gas detection and alarm system)
	Model GD-A8
	Model GP-146
	Aproval: H.K, K.R, CCS
	Features:
	Compact and light weight. Digital display(LED) for gas concentration readout. Self-diagnostic functions by microprocessor. Two alarm levels, trouble alarm External output 4-20mA, Relay output Maintenance mode function.
	Applications:
	LP Gas manufacturing, storage, and consuming facilities. Factories using high pressure gas. Chemical plants General manufacturing plants.

	Model RM-630 Series (Single -channel gas detection and alarm system)
	Features:
	Compact and light weight. Wide variety of detectable gases and detector heads Two alarm levels, trouble alarm Maintenance mode function. Zero suppression function Recorder output (option)
	Applications:
	Petro-refinery, petrochemical plants. Chemical plants Semiconductor manufacturing plants Engineering public works Power station, gas utilities Iron and steel works Oil/gas carriers


	Model SD-705EC
	Approvals: TIIS
	Features:
	Flame proof design
	Specification:
	Detection gas	Hydrogen sulfide (H2S) in air
	Detection principle	Electro-chemical cell
	Detection Range	0-30ppm
	Alarm preset levels	1st: 10ppm, 2nd: 20ppm(adjustable)
	Operating temp. & humidity	-10C~+40C, below 95%RH (non-condensing)
	External output	Alarm contact: Gas alarm and trouble alarm Single output: Gas concentration 4-20mA, Linear Malfunction: 0.5mA At maintenance mode & initial clear time: 2.5mA
	Power source	DC24V+10% (max 2.5W)
	Structure	Flame proof structure Exd II BT4
	Signal transmission	Max. 1.25km with CVVS 1.25sq cable Max 2km with CVVS 2.0sq cable
	Dimensions & Weight	205(w)X134(H)X90(D)mm, Approx. 4kg
	Specifications subject to change without notice.

		Model SD-705RID (sample drawing type)
		Model SD-705RI (Diffusion type)
		Model SD-705SC-RI (Remove type)
		Approvals: MED, TIIS
		Features:
		Remote detector head GD-A45RI can be installed at high location (eg. on the celling in engine room of LNG carrier and at the product facility area of FPSO and LNG RV.) Optional remote calibration cap can permanently be mounted on the sensor head. Calibration work with test gas can be done on the floor with no climbing ladder.

		Model Tri (3)-Head Gas Detector
		For Marine Pump room
		Features:
		3 Sensors, 1 explosion proof housing Infrared sensors available for combustible gases Interfaces with Beacon 410 controller Available for LEL, O2, H2S and CO Water repellent patented sensor coating Long life sensors (2 + years typical)
		Applications:
		Wet Wells Dry Wells Bar Screen Lift Station Digesters Thickeners Primary Clarifiers Pump Stations Confined

	Model SD-805RID Series
	Features:
	Explosion proof housing IP65 ingress class Small, rugged, dust and weather proof construction Non-Dispersive Infrared Ray Absorption (NDIR) method capability Direct digital readout Back-light LCD display 4-20mA linear outputs Dual alarm contacts Self-diagnosis by microprocessor Automatic zero correction function Simple adjustment with magnetic control key

	Model M2 Series (Stand alone explosion proof transmitter)
	Features:
	Operates independent of a controller Direct digital readout on backlit LCD Available for LEL, H2O, CO and O2 4-20mA & digital Modbus outputs standard Non-intrusive calibration via magnetic wand 2 fully programmable alarm relays & fail relay H2 specific LEL version available Infrared combustible version available Patented water repellent sensor coating User friendly setup push buttons & LCD menus Intrinsically safe, CSA, C/US classified
	Applications:
	Petrochemical plants Refineries Offshore drilling platforms Water & wastewater treatment plants Pulp & paper mils Gas, telephone, & eletirc utilities Parking garages Manufacturing facilities Steel Automotive

	Model "S" Series (4-20mA Gas Sensor/Transmitter)
	Features:
	Explosion proof housing Patented water repellent sensor coating Operates independent of a controller Available for LEL, H2S, CO, O2 and ppm HC Long life sensors (2 + years typical) Competitively priced
	Applications:
	Petrochemical plants Refineries Offshore drilling platforms Water & wastewater treatment plants Pulp & paper mils Gas, telephone, & eletirc utilities Parking garages Manufacturing facilities Steel Automotive Chemical storage buildings

Semiconductor

	Model GD-K71D
	Model GD-V77D
	Model GD-F77D
	Approvals: CE
	Features:
	High brightness LED assures clear reading even in dark places Trend graph for alarm evidence Self-diagnostic functions Two alarm levels, trouble alarm plus relay outputs Maintenance capablity by remote PC Various communication networks CE approved
Specifications:
Model	GD-K71D	GD-V77D	GD-F77D
Model designation and signal transmission	GD-K71D: 4-20mA GD-K71D-NT: DC power line communication GD-K71D-DV: Device Net GD-K71D-LN: Lon Works	GD-V77D: 4-20mA GD-V77D-NT: DC power line communication GD-V77D-DV: Device Net GD-V77D-LN: Lon Works	GD-F77D: 4-20mA GD-F77D-NT: DC power line communication GD-F77D-DV: Device Net GD-F77D-LN: Lon Works
Detection principle	Electronchemical cell	Semiconductor method	Galvanic cell
Target gas and detection range	Contact us for details	H2 in air 0~2000ppm CH2F2(R-32) in air 0~2000ppm	O2 in air 0~25%
Gas concentration display	Digital LED display, 4 digits 7 segments
Alarm display	1st alarm: Yellow LED light, 2nd alarm: Red LED light, Trouble alarm: Green LED flashing
Alarm relays	Normally-open or normally-close contact for both AL1/Al2 and trouble, rated 0.25A at 125VAC/0.5 at 24VDC(Resistive load)
Self-diagnostic function	Trouble, low flow, system trouble, communication error.
Operating conditions	0~40C, 30~85%RH, non-condensing		0~40C, below 90%RH, non-condensing
Power requirement	24VDC+10%. Approx.10W
Applicable tubing for outer connection	O.D. 6-1t PTFE tubing (provided with P.P coupling)
Applicable cable	Shielded cable, 3C, 1.25sq. (Shielded twisted one pair cable for NT series and exclusive cable for DV series)
Dimensions & Weight	Approx. 70(W)X170(H)X153(D)mm (Expect for DV) 70(W)X210(H)X153(D)mm (DV only) Approx. 2kg
Specifications subject to change without notice.

	Model GD-K77DG (for NF3, R-123)
	Approvals: CE
	Features:
	High brightness LED assures clear reading even in dark places Trend graph for alarm evidence Self-diagnostic functions Two alarm levels, trouble alarm plus relay outputs Maintenance capablity by remote PC Various communication networks CE approved
Specifications:
Model designation and signal transmission	GD-K77DG: 4-20mA GD-K77DG-NT: DC power line communication GD-K77DG-DV: Device Net GD-K77DG-LN: Lon Works
Detection principle	Pyrolysis-electronchemical cell
Target gas and detection range	NF3 in air 0~30ppm R-123 in air 0~100ppm
Gas concentration display	Digital LED display, 4 digits 7 segments
Alarm display	1st alarm: Yellow LED light, 2nd alarm: Red LED light, Trouble alarm: Green LED flashing
Alarm relays	Normally-open or normally-close contact for both AL1/AL2 and trouble, rated 0.25A at 125VAC/0.5A at 24VDC (Resistive load)
Self-diagnostic function	Trouble, low flow, system trouble, communication error.
Operating conditions	0~40C, 30~85%RH, non-condensing
Power requirement	24VDC+10%, 10W and 100~120VAC or 200~240VAC, 70VA
Applicable tubing for outer connection	O.D. 6-1t PTFE tubing (Provided with P.P coupling)
Applicable cable	Shielded cable, 3C, 1.25sq. (Shielded twisted one pair cable for NT series and exclusive cable for DV series)
Dimensions & Weight	Approx. GD-K77DG: 140(W)X170(H)X153(D)mm, Approx. 3.2kg Approx. GD-K77DG-DV: 140(W)X210(H)X153(D)mm, Approx. 3.5kg
Specifications subject to change without notice.

	Model GD-S77DG (for TEOS,TMS,TRIMS,TMOP,HMDS )
	Approvals: CE
	Features:
	High brightness LED assures clear reading even in dark places Trend graph for alarm evidence Self-diagnostic functions Two alarm levels, trouble alarm plus relay outputs Maintenance capablity by remote PC Various communication networks CE approved

	Model GD-F77A (for O2 )
	Approvals: CE
	Features:
	High brightness LED Self-diagnostic functions Two alarm levels, trouble alarm plus relay outputs Various communication networks CE approved

	Model GD-K82Ai Intrinsically Safe in Japan
	Approvals: CE, JML
	Features:
	Remote monitor capabilty by extender cable 3m Remote sensor type for duct mounting available Intrinsically safe design Digital display(LCD) for gas concentration readout Calibration and other sensor information stored in sensor memory Trend graph for alarm evidence Self-diagnostic functions by microprocessor Quick replacement sensor
	Applications:
	Semiconductor/LCD Fabrication Plants Petrochemical/ Chemical PLants Iron/Steel mills Work Enviroment

	Model FP-260 AGZS
	Model FP-300
	Features:
	PPB detection for many gases PPB or PPM digital display Easy transportability Interference-free detection Easy to replace cassette tape Cassette tape remainder display Panel mounting configuration available (FP-300) Self-diagnostic functions 2 alarm levels

CO2 Monitor

	Model RI-215A
	Approvals: CE
	Features:
	Easy to read LCD digital display Compact, lightweight amd easy installation Highly reliable Non-Disoersive Infrared gas absorption method used Recording output single Automatic control of ventilation in autos and buildings provides energy for energy saving

Oxygen Monitor

	Model OX-500 (for O2)
	Approvals: CE
	Features:
	Compact, wall mounting design Highly visible 3 colour LED digital display Remote sensor capabilty Power cable can enter from any direction Stores alarm summary data (10 alarm events, time and alarm concertration)
Specifications:
Model designation and signal transmission	4-20mA
Detection principle	Galvanic cell
Target gas and detection range	O2 in air 0~25%
Gas concentration display	3 digits, 3 colour LED
Alarm display	Warning: Yellow LED Alarm: Red LED Trouble: Red error message
Alarm relays	Normally-open contact for both AL1/AL2, rated 1A at 125VAC (Resistive load)
Self-diagnostic function	Memory error, sensor disconnection
Operating conditions	0~40C, below 95%RH, non-condensing
Power requirement	24VDC+10% or 100~120VAC
Applicable cable	3m power cable is supplied
Structure	Wall mounting
Dimensions & Weight	Approx. 95(W)X135(H)X35(D)mm, Approx. 0.42kg
Specifications subject to change without notice.

CO Montitor

	Model EC-500 Indoor carbon monoxide gas monitor
	Features:
	Compact, wall mounting design Highly visible 3colour LED digital display Remote sensor capablity Power cable can enter from any direction Stores alarm summary data. (10 alarm occurrence, time and alarm concentration)

For PFC, HCFC, HFC AND IPA

	Model RI-257
	Features:
	wall mounting design for easy installation Negliable interference from other gases Self-diagnostic functions 4~20mA linear outputs Two alarm levels, trouble alarm plus relay outputs Audible and visual alarms Automatic backlight during alarm Automatic zero correction function

N2O Monitor

	Model RI-2000W (for N2O)
	Features:
	wall mounting design for easy installation Negliable interference from other gases Self-diagnostic functions 4~20mA linear outputs Two alarm levels, trouble alarm plus relay outputs Audible and visual alarms Automatic backlight during alarm Automatic zero correction function
Specifications:
Detection principle	NDIR(non-dispersive Infraed Ray Absorption) method
Target gas and detection range	N2O(Nitrous oxide) 0~200ppm
Display	16 digits LCD (with backlight)
Alarm display	Gas alarm: Yellow WARNING light, Red ALARM light Trouble alarm: Flashing green light
Alarm preset level	50ppm (WARNING), 100ppm(ALARM)
Alarm relays	Normally-open (standard) or normally-close(optional) contact for both WARNING/ALARM and trouble, rated 0.1mA~0.3mA at 125VAC (Resistive load)
Self-diagnostic function	Lamp trouble, sensor trouble, heater trouble, low flow, fan stop, system trouble
Analog output	4~20mADC, linear, non-isolated sourcing signal, max loop load 300omega
Operating conditions	0~40C, 30~90%RH, non-condensing
Power requirement	100VAC or 220VAC +10%, 50/60Hz
Power consumption	Max. 400VA
Dimensions & Weight	Approx. 350(W)X440(H)X160(D)mm, Approx. 7kg
Specifications subject to change without notice.

Controller

	Model RM-590 Series (Multi-Channel Gas Monitoring System)
	Features:
	4 digits digital LED display for gas concentration 2 alarm levels with relay User selectable alarm functions (latching, self reset), and alarm test functions Integrated compact design with easy plug-in type module Zero suppression function (Maintenance mode function) Accepts flow failure alarm Provides 4-20mA output Wide variety of detectable gases and detector heads LonWorks network available as option
	Applications:
	Petro-refinery, petrochemical plants Chemical plants Semi-conductor manufacturing plants Engineering public works Power station, gas utilities Iron and steel works

	Model Beacon 410 (Four Channel Wall Mount Controller)
	Features:
	Simultaneously monitor up to 4 channels Digital Display of all 4 channels Accepts direct connect sensors for LEL/ O2/ H2S/ CO/ CO2 Accepts any 4-20mA transmitter, 2 or 3 wire 3 programmable alarm levels per channel Up to 3 configurable alarm relays per channel Zero follower automatically compensates sensor drift 4-20mA analog & Modbus digital output standard 115/ 220VAC or 24VAC operation Audible alarm with silence feature Alarm reset switch Built in trouble alarm with relay Weather proof NEMA 4X enclosure Optional strobe & battery backup available
	Applications:
	Petrochemical plants Refineries Water & wastewater treatment plants Pulp & paper mils Gas, telephone, & eletirc utilities Parking garages Manufacturing facilities Steel Automotive HVAC

	Model RM-570A (Multi-channel gas detection and alarm system)
	Model RM-580
	Features:
	Receives a wide variety of sensors Easy to read LED bargraph display (52 segments) Combustible gases detectable in wide range (from PPM to %LEL) with one display unit (NC-571AW/NC-581W) Accepts any 4-20 mA transmitter input powered from 24VDC Two alarm levels Peak hold function Zero suppression function Maintenance mode function Alarm test mode Auto zero function Ability to indicate a flow failure alarm 4-20mA outputs Model RM-570A series features with single LED red color readout and Model RM-580 series with multi LED color readout (green, orange, red)
	Applications:
	Semiconductor Fabrication Plants Petrochemical plants Refineries Water & wastewater treatment plants Pulp & paper mils Gas, telephone, & eletirc utilities Iron and steel works

Fixed Gas Detector

R K INSTRUMENTS (S) PTE LTD
102F, #03-10, Citilink Warehouse Complex,
Pasir Panjang Road, S (118530)
Tel : (65) 62753398
Fax : (65) 62753387

Email :	rk@rkinstruments.com.sg
	rkqkk@singnet.com.sg